Pontiac 400 Vs 455

QUICK vs CUSTOM SEARCH. Round Ports, 1. 875,so 350 can't be bored to 400 dimension. The 6x have the 2. The 350, 400, and 455 are interchangeable but today most Pontiac enthusiasts want the 455 with aluminum cylinder heads. They are usually stamped on the machined pads by the valve covers. A 500hp 400 is not a difficult build. Be advised that a healthy 455 will destroy your stock transmission. It has since been upgraded by ARC Race Cars in New Oxford PA with a chrome moly roll cage, chrome Strange Strut Front end, double frame rail and 9″ rear, NHRA certified to 7. I was just wanting to get some thoughts on the 400 to 455 conversion. Engines originally displacing up to 400ci utilized a crankshaft with 3-inch diameter. Compression can be increased or deceased through proper cylinder head selection. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. Featuring a Pontiac 400 cubic inch block stroked to 455 cubic inches, this authentic Pontiac stroker is perfect for street and strip use. These Tin Indian Performance Gasket & Seal Pontiac rear main seals are specifically designed for the Pontiac block. Trans Am Engine Specifiactions 1970-1981. Pontiac Bonneville, 1961-64 V8 389/421 Radiator NOTE: Factory 2-5/8" Thick Core, 3" Wide Mounts ENGINE: V8 389/421. Owner Bruce Fulper can answer ANY question for you. Take a ride through the era with this flashback and photo gallery. ” Pontiac used the Quadrajet on its V-8s ranging from 301 to 455 ci. It retained a 4. Buick 455 vs Olds 455 vs Pontiac 455 I know several members have swapped a Buick 455/TH400 in their FSJ. com public database resutls for Pontiac stock 0-60 and 1/4 mile times. I want to know if there is any huge, noticeable difference between the two, or if anyone will even notice. Here is some information on the pulleys and brackets that were used over the years on the 400-430-455. In 1970 Pontiac increased the displacement in an attempt to make up for reduced compression required by new government regulations. Of the four, perhaps the most intriguing was the Formula 400. [email protected] street driver. 123" h-beam rod for 318 chrysler 440 6. Adams' team cleverly disguised the new motor as a warmed-over version of the high-volume production 455 in Pontiac's parts bin, but in reality, the SD-455 more closely resembled a detuned race motor and shared very little in common with the more pedestrian. Can you give me the low down? So far, it seems that the 350 has a smaller bore, but the 400 and 455 share the same bores, but different strokes. i may not be able to afford the best flowing iron heads (ram air), but i do have a set of 6x heads. anyone here who says different does not know what they are talking about. Meanwhile, the SD-455 engine remained on hiatus throughout the winter of 1972-1973, even though eager buyers had been placing orders for SD-455 powered GTO's. Here are the top Pontiac Firebird listings for sale ASAP. 625 Pontiac journal with bushed or press fit. ** Use sheet stainless steel block off plate. com public database resutls for Pontiac stock 0-60 and 1/4 mile times. The 428s have gotten pretty stupid moneywise as of late. The 368 has the distinction of being the last traditional "big-block" cast-iron pushrod V8 engine available in a production car. XS Torque Starter GM LS Apps. All of the reputable sources I've spoken with say the Pontiac rods will work fine. The PowerNation consists of: Detroit Muscle, Engine Power, Truck Tech, Xtreme Off Road (XOR), PowerNation Daily, HorsePower, Muscle Car, Trucks!, and Xtreme 4x4. It is a 3-holer with two blank pads (no holes). year: part number: size: description: 1958-60: 400/455: fb 4 barrell: 1973: 494405-19: 455 sd: fb 4 barrell(has ls2 or ls2x cast in. 1964 to 1969 Pontiacs engines were all 2-hole blocks. In this case you'd think you could save the cost of the pistons, but probably not because the resulting compression ratio would likely be too high for pump gas so you'll be replacing. 62,182 Mileage - Clean Texas Title - Number's Matching. 15 and a stroke of 4. 1978 Pontiac Firebird Classic Cars for Sale. In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads. These head numbers represented chamber sizes. Ive got a 78 Monte Carlo and will be putting a Pontiac 455 in it. ** Use sheet stainless steel block off plate. 12" bore and 350 has smaller 3. Guy at the racing shop is settin me up with my rear suspension and just got a ford 9 inch from quickperformance. Then Buick had the old nail valve 401, not a bad. Since the 455 engine rotates clockwise (viewed from the front), I thought this strange. 1976 Pontiac Firebird 1976 Firebird TransAm HO 455 correct Vin# WX stamped block, correct Vin# stamped 4spd Trans, correct stamped Posi-Trac Rear end-all match correct to its (pictured) build sheet, 45k original miles. 15 and a stroke of 4. Email alerts available. The 400 automatics perform well with the 068 and 1. It's compatible with any 400 or 455-ci Pontiac block and most any aftermarket unit. First generation Firebirds originally had the straight version, but if you want your oil filter a little closer to the engine, here's your answer. 50 to run as fast as I want to safely. The Hydra-Matic. An exception is the SD 455, but stock Vs stock I would say a RA III/IV has the edge on a '72 455 HO. And a 428 makes torque, but nothing like a 455. The 368 has the distinction of being the last traditional "big-block" cast-iron pushrod V8 engine available in a production car. Pontiac 350, 400, 455 HD Oil Pump Cover PlateThis ia a Pontiac 350, 400, 455 HD Oil Pump Cover Plate. 400 great for strip. It isn't really a Frequently Asked Question, so I'll call it an "FYI", For Your Information. you can check internet for Pontiac Engine Identification Codes. Al Leiby’s 1972 Cameo Ivory 1968 GTO, featured on the July 2019 issue cover, is one of the rarest of its type, being one of only 240 Y-Code—D-port-head, 455 CID, 250 (SAE net) hp, 375 pound-feet of torque—built. Pontiac placed displacement callouts on each side of the block in 1968, and cast the last two digits of the displacement size into the center of the lifter valley. 8 rod combo is the most popular, stick with what works. 1969 facelift was not an exception – it has nothing in common with the same year sibling, however, looking in profile it was easy to confuse. Big block Pontiac crate engines are also available in 428, and 455 versions. I am working on a pontiac 455 and it appears that the parts are hard to find and when you find them easy or hard the prices. Adams' team cleverly disguised the new motor as a warmed-over version of the high-volume production 455 in Pontiac's parts bin, but in reality, the SD-455 more closely resembled a detuned race motor and shared very little in common with the more pedestrian. "455" stamping on. im just tryin to see what my options are, because like most i dont have the money for an after market block. The 1970 and 1971 Pontiac Grand Prix carried on even after the man who kept the line alive moved on. These head numbers represented chamber sizes. 875 inches and has a stroke of 3. Selecting a Hydraulic Cam for your Pontiac Engine. I haven't decided on a cam yet until if find more info on which heads to run. This trend continued until the end of the 1979 model year when the last W72 400 powered Trans Ams left the assembly line. Email alerts available. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after some public outcry a "455 HO" package was offered for the Firebird's top of the line Trans Am model. Distributors that are nothing special are sold at a discounted price and will work fine for most applications while our rare and very hard to find distributors are priced to reflect their true collector value. It is a 3-holer with two blank pads (no holes). Most notable were the twin pin stripes along the upper beltline and body side accent moldings were slightly revised. Note that the cylinder number 1 is the next driver in front of the engine (the same location on all V-engines) or just the first behind the power steering pump. If you have questions please direct them to the Q & A. "455" stamping on. 1 Certified and are double MIG/TIG welded for additional strength and lasting precision pass after pass. The GTO had always been the top trim level of the Pontiac A-body, until 1973, when it was supplanted by the Grand Am, which was basically the same car plus the sleek Endura front end, RTS(Radial Tuned Suspension) and some interior upgrades. Your ahead of the game using a 3" 400 main bearing vs a 455 main size of 3. I actually prefer the buick 455, that 455 made that 1972 buick riveria fly! the olds was a a close socond though but I have a feeling it was carb issues making it hold back as much. SLP 455 Bobcat GTO and ZL465 Corvette. Their rated at 850hp+. PONTIAC 400-455 COMPETITION ROTATING ASSEMBLIES. Custom Crate Engines takes great pride in all of our Chevy performance engines. Let's see, Pontiac had the 389 which became the 400, and the 421 was a larger version. Once that’s done, turn the ignition key to the on position and let the fuel pump do it’s thing for a few seconds. The BEST small block heads now feature an 18 degree valve angle, or the "splayed valve" heads for SB-2. GMC Transmissions; Pontiac Transmissions; GM Vehicle Transmissions Transmissions Applications; TH-350; TH-400; 700R4 4L80-E Transmissions; 2004R; Powerglide. Trans Am Engine Specifiactions 1970-1981. The mistake Pontiac made with the '75 L75 Trans Am was marketing the package as the 455 H. Often it isn't visible at first sight either because it may be hidden by r. Selecting a Hydraulic Cam for your Pontiac Engine. 7 mm) cylinder bore spacing, and was produced in three displacements, 400, 430, and 455, through 1976. If your needs are a stroker crate motor we can take and modify any Pontiac engine to your specifications. will not fit under all pontiac stock hood. Engine Codes & Production Figures. Next to the distributor hole there is a casting number that has a letter with 2 or 3 numbers. XS Torque Starter GM LS Apps. Cometic Gaskets Cylinder Head Gasket Pontiac 400/428/455 Cometic Gaskets C5712-027 Part Number: 245-C5712-027. They also had a 455. In light of this, the 'Year' entry, as indicated by the chart below, may actually represent the year that the heads were cast, versus the year that they were actually installed on an automobile. 9 liter) V8 rated at just 135 bhp was available in Esprits and Formulas, with the familiar 350 was optional. com Get details about the 2006-2004 Pontiac GTO (LS1, LS2) superchargers and where to buy the ProCharger parts for the Pontiac. Comments: Undaunted by the death of their tri-power setup, Pontiac unveiled an all new 400 cid enlargement of the 389 cid engine. BACK For a more complete and up to date engine codes and other information, try my search page. It was a 2bbl car. Most Pontiac blocks are drilled and tapped for the 4 bolt main caps but the factory only installed the 2 bolt mains on most motors. Comparing Pontiac vs Oldsmobile may also be of use if you are interested in such closely related search terms as pontiac 400 vs oldsmobile 403, pontiac 455 vs oldsmobile 455, pontiac montana vs oldsmobile silhouette, pontiac grand am vs oldsmobile alero. So, the 73 also has 290HP stock. Based on production block and heads, this combination provides plenty of power with quality bottom. Meanwhile, the SD-455 engine remained on hiatus throughout the winter of 1972-1973, even though eager buyers had been placing orders for SD-455 powered GTO's. # cyl/CID: Carburetor: Horsepower: Torque: Bore x Stroke: Compression Ratio: Oil Pressure @ 2050 RPM. Home of the IA II Pontiac Engine Block. Let's see, Pontiac had the 389 which became the 400, and the 421 was a larger version. Pontiac 400 vs 455 vs chevy 350. XS Torque Starter for Ford Flathead. In addition, the crank journals are different sizes. Small and Big blocks refer to Chevy engines only. 1968-69 Pontiac engine codes decoder reveals the code prefix, engine performance, displacement, and configuration. Remanufactured Engines Jeep AMC. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6. Pontiac 350, 400, 455 HD Oil Pump Cover PlateThis ia a Pontiac 350, 400, 455 HD Oil Pump Cover Plate. 407 camshaft, HO oil pump, slotted bearing caps, special balancer, and distributor curve, another 20. Compression Calculator My thanks to Lee for the concept and research. Pontiac GTO, Pontiac Lemans, Pontiac Tempest, The best source for GTO books, 455 4Spd WA 10. I know there are a few Pontiac faithful on here. It is overly heavy and not very powerful, get yourself a nice 400 or 455 for that Firechicken (just expect to pay a nice premium on anything Pontiac). Pontiac rebuild--how to degree a cam. 1967 - 1981 Pontiac Engine Oil Filter Adapter Housing Angled, NEW New correct angled oil filter adapter for your bird. First generation Firebirds originally had the straight version, but if you want your oil filter a little closer to the engine, here's your answer. over 500 trips down the drag strip with my current 1/4 mile time/spd are 12. A kick ass / durable V8 motor that was produced by Pontiac Motor Division from 1968 to 1977. This is Kauffman Racing Equipment line of race gas crate engines. To differentiate them it will have to be determined what year the block is. pontiac engine decoder year code c/i hp tran carb car misc 1962 13b 421 3 m 2 x 4 full super duty 1962 13u 421 4 m 2 x 4 full super duty 1967 xl 400 255 1967 xm. GMC Transmissions; Pontiac Transmissions; GM Vehicle Transmissions Transmissions Applications; TH-350; TH-400; 700R4 4L80-E Transmissions; 2004R; Powerglide. This particular Pontiac Firebird 400 HO with Ram-Air in Livonia, Michigan gives up little to most Trans Am-packaged Firebirds from the same year. 250 stroke with a 455 bore size (4. In this week's Mailbag, we're recommending a parts combo to get 400+ horsepower from a Pontiac 400 engine in a 1968 Firebird. True Pontiac engines were made by the Pontiac Motor Division. The rear and grill were restyled again and the new 400 cid engine was available in economy (255bhp), standard (335bhp), High Output (HO) (360bhp) and Ram Air (360bhp) versions. Standard length 6. The mistake Pontiac made with the '75 L75 Trans Am was marketing the package as the 455 H. It was also the last year for The Judge, and sales crashed as the golden muscle car era was drawing to an end. pontiac 400. The 400-455 is pump gas friendly for the mild daily driver. The Hydra-Matic. While that makes the 455 crankshaft stronger than the 400, it also makes the block weaker. If your needs are a stroker crate motor we can take and modify any Pontiac engine to your specifications. The little N/C are a good thing. 1970 to 1972 Pontiac Firebird for Sale Here is a low production 1970 Pontiac Trans Am that retains it's original YZ coded 400 cubic 1974 Pontiac Firebird. And with the mid year introduction of the Firebird, there were plenty of owners showing off Pontiac's 67 hardware on the streets and strips of America by the end of the m. With the 69 and up timing cover. If your head has a large S1 cast into the the area where the rocker arms sit, don't get too excited. More listings are added daily. 875 inches and has a stroke of 3. See prices, photos and find dealers near you. Boy, have I answered this question a good number of times. I'm not so sure that's all fact if you put in aftermarket, 4 bolt main caps on the 455. It is CNC Laser cut from 1/4 Steel Plate. Pontiac was forced to forge ahead in a new direction. The Pontiac model 4MV used through 1974 generally offers a maximum airflow capacity of 750 cfm. DCI 400-455 is DCI's most popular crate engine. Take a ride through the era with this flashback and photo gallery. Dyer Blowers manufactures, sells and services 471, 671, and 871 kits for Chevy, Ford, Chrysler, Mopar, Dodge, Plymouth, Pontiac, AMC, Buick and Oldsmobile V8 Engines. Heads courtesy of Dennis Wheeler. Trans Am's featured either a Oldsmobile 403 (6. #9799103 Pontiac 455 V8 Crank Shaft$400. I am, however, finding many Buick 455's. Got a set of KRE wide port heads in the shop on the bench and going to flow them after lunch. Chevy 12 bolt uses C-clip axle retention. 7 mm) cylinder bore spacing, and was produced in three displacements, 400, 430, and 455, through 1976. They feature the standard Pontiac exhaust arrangement; Saving you lots of money not having to buy a set of round port headers. The throttle bore size and spacing differences lend the term "spread bore. Of the four, perhaps the most intriguing was the Formula 400. Whether your vehicle is a Corvette, Camaro, Nova, Chevelle, or just an early 60's muscle car, we are here to help design and build the engine combination to match you with your vehicle. Boy, have I answered this question a good number of times. Cometic Gaskets Cylinder Head Gasket Pontiac 400/428/455 Cometic Gaskets C5712-027 Part Number: 245-C5712-027. Pontiac 455 Engine Block Prep. Whether your vehicle is a Corvette, Camaro, Nova, Chevelle, or just an early 60's muscle car, we are here to help design and build the engine combination to match you with your vehicle. The Pontiac 455 has a bore of 4. and do some other things to help them out, like modify the valves to increase flow, but i. Got a set of KRE wide port heads in the shop on the bench and going to flow them after lunch. All 1970 GTOs with factory 455 option had the stronger Chevy 12 bolt rear end vs. 1976 Pontiac Firebird 1976 Firebird TransAm HO 455 correct Vin# WX stamped block, correct Vin# stamped 4spd Trans, correct stamped Posi-Trac Rear end-all match correct to its (pictured) build sheet, 45k original miles. pontiacpower. Improve your engines oil pressure, oil temperature, and coolant system with Canton Racing Products. Then on March 19th, 1973 a Pontiac memo announced that the SD-455 engine would be cancelled for the GTO, Lemans Sport Coupe, and Grand Am, without Pontiac having produced a single unit. Arlington, WA Map is approximate to keep the seller's location private. XS Torque Starter for Ford 390-427-428 "FE" Only. Pontiac - 287, 301, 316, 341, 350, 370, 389, 400, 421 & 455 Performance level 3-4 - High Performance Compu-Pro - Intended for the performance oriented hot street application. Outer dimensions are the same but bore and stroke aren't. The first was the Ram Air III, which was a 400 cid V-8 with big-valve D-port heads, cast iron intake, and high-flow exhaust manifolds. The Last 400 Trans AM By Bob Wicker Photos by owner Jacob Shepherd. It isn't really a Frequently Asked Question, so I'll call it an "FYI", For Your Information. The only Pontiac that impressed me more was a 455 SD. The secret to the 455 HO was its round-port heads, which were a hallmark of Pontiac’s strongest engines starting with the 366-horse 1968 Ram Air II 400 that was introduced in the middle of the. Do not be fooled by Imitations! Click Here to see the difference. These engines were available in the following cubic inch displacements: 326, 350, 389, 400, 421, 428, and 455. If your Pontiac has screw in studs with a "necked down" type step stud on the topside, they can be replaced with these 7/16" studs. The 350, 400, and 455 are interchangeable but today most Pontiac enthusiasts want the 455 with aluminum cylinder heads. click image for larger view. If your head has a large S1 cast into the the area where the rocker arms sit, don't get too excited. Identify a PONTIAC engine block is very simple, the code is entered, or rather "hit" on the front right of the cylinder block (when you're driving), close to the plane of the cylinder head gasket. Chevy 400 & Pontiac 400 differences. Find out if your engine is for a standard or automatic tranny, Standard tranny engines are ussually built stronger and should be used for automatics or standards, but an automatic tranny engine should be used for automatic tranny only. CNC machined Oil Slot. Components are interchangeable from each displacement, other than 265 & 301, which are only compatible with themselves. Next to the distributor hole there is a casting number that has a letter with 2 or 3 numbers. I would be willing to bet some Pontiac guy would trade you a 400 or 455 AND a good pile of cash for the 428. Can you give me the low down? So far, it seems that the 350 has a smaller bore, but the 400 and 455 share the same bores, but different strokes. Builds the BEST stock to the highest Pontiac torque monsters on the planet. Selecting a Hydraulic Cam for your Pontiac Engine. The 400 was inspired by the Pontiac 389 V8 and proved to be the last Pontiac engine with closed chambered heads. *Note - blocks with only 2 mounting holes or pads (for the motor mounts) per side is from 1969 and older blocks with 5 or 3 mounting holes or pads (for the motor mounts) per side is from 1970 and newer blocks with 2 freeze plugs per side is 1966 and older blocks with 3 freeze plugs per side is 1967 and newer certain blocks for 4 bbl carb usage have scallops in the cylinders at the deck for. 6L/400 Fuel Injection Systems and get Free Shipping on Orders Over $99 at Summit Racing!. Arlington, WA Map is approximate to keep the seller's location private. Curiously, the 455, a long-stroke engine taken from the full. features include gto logo made of high temp vinyl oil,grease,gas or heat will not affect them. The 455 cylinder heads will have larger combustion chambers than the same year 400. The Pontiac brochure indicated the same 455 installed in the Grand Prix model was rated at 370 horsepower (280 kW). The 428s have gotten pretty stupid moneywise as of late. There are two ways to accomplish this. The throttle bore size and spacing differences lend the term "spread bore. My Oldsmobile early A body on the other hand, well, thats a different story. So when I start looking for parts, I would like to know if I am limited to just Pontiac 400 motors or if I can use parts from any Pontiac engine (350/400/455). 1978 Pontiac Trans Am 400 4sp, ONE OWNER 26k actual miles! It has received a period-correct Pontiac 455 HO. See more of Pure Stock Muscle Car Drag Race on Facebook Firebird 400 launching against a 1973 Formula SD-455. It is entirely reasonable to see the Pontiac 400 being proposed as a California-only alternative to the 455. High Output and Super Duty versions of the 455 were added in succeeding years. Q: I want to build a. The Pontiac 455 has a bore of 4. We design and CNC machine all of our brackets in the USA using aircraft-quality 6061-T6 billet aluminum. The compression ratio was lowered to 9. Their rated at 850hp+. A kick ass / durable V8 motor that was produced by Pontiac Motor Division from 1968 to 1977. Thunder Valley Raceway 2016 Buick Ford shoot out qualifying run vs a Mustang. Feel free to contribute. Sorry this page is a little long. This can be found on the distributor pad. 66″ exhaust valve may work as well as the 1. My Oldsmobile early A body on the other hand, well, thats a different story. you can check internet for Pontiac Engine Identification Codes. I haven't decided on a cam yet until if find more info on which heads to run. It retained a 4. They are assembled complete except for manifolds, distributor, valve covers, and water pump. Ive got a 78 Monte Carlo and will be putting a Pontiac 455 in it. With a wide variety of parts and modifications available, the Pontiac 350 crate motor can be customized to meet your horsepower needs. # cyl/CID: Carburetor: Horsepower: Torque: Bore x Stroke: Compression Ratio: Oil Pressure @ 2050 RPM. i do have a pontiac 400 4 bolt block out in my garage that i was going to use for this build but it has severe pitting in the cylinder walls and i have not be able to take it to a machine shop yet to see if it is repariable. There are 20 1976 Pontiac Firebird Trans Ams for sale today on ClassicCars. Next to the distributor hole there is a casting number that has a letter with 2 or 3 numbers. Where the 455 IS "weaker", is the block itself. PONTIAC,Pontiac 400/428/455 Flat Top - JE Pistons Pontiac 400/428/455 Flat Top. Learn more about: 2006-2004 Pontiac GTO (LS1, LS2) at ProCharger. 461 cubic inch Pontiac turbo combination from Butler Performance Butler Performance is one of a few who specializes in Pontiac engines. Unless you have some special-purpose constraints (extremely heavy vehicle, need to run tall gears, pure stock drags) there isn't much good reason to go with the 4. The letter is the month, next 2 digits are the day and the last digit is the year. The first column contains the intended use or application category. The bore size of the Chevy affects flow just like the Pontiac, where the small valve heads "work" better with the smaller bores. Unfortunately, just like the 455-cid engine, these engineers knew that the Pontiac 400-cid engine would also soon be phased out. Feel free to contribute. 64's before that- both engines made nice power, but to be honest the 400 got a little better mpg (13-15 mpg w/ a Holley 750 vac sec. This would be a quick way to verify it was originally a 455 car. The 428s have gotten pretty stupid moneywise as of late. Do that and you have a winner!. Engine Search. will not fit under all pontiac stock hood. 25 inch mains. It was a 2bbl car. Replied by Chevyman21 on topic Olds 455 Vs Pontiac 455 Vs Buick 455 andrewbutton442 wrote: Chevies always seem to have enough room to get back in there. 1967 Pontiac GTO. Just how much horsepower a stock Pontiac 400 or 455 block can handle is a question that Butler has been asked countless times over the years, and he says there isn’t a straight answer. These engines were available in the following cubic inch displacements: 326, 350, 389, 400, 421, 428, and 455. Pontiac 455 Engine Block Prep. Other examples include "50" or "55," which indicate a 350 or 455, respectively. com public database resutls for Pontiac stock 0-60 and 1/4 mile times. There were few differences on the 1967 GTO from the previous year. We specialize in used engines of all kinds including American, Domestic, Japanese, German and foreign engines. It is CNC Laser cut from 1/4 Steel Plate. Email alerts available. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after some public outcry a "455 HO" package was offered for the Firebird's top of the line Trans Am model. And a 428 makes torque, but nothing like a 455. Let's look closer at a Pontiac W72 engine and the codes that separate it from the regular 400 V8. The 6x have the 2. Quality parts for Pontiacs. True Pontiac engines were made by the Pontiac Motor Division. GMC Transmissions; Pontiac Transmissions; GM Vehicle Transmissions Transmissions Applications; TH-350; TH-400; 700R4 4L80-E Transmissions; 2004R; Powerglide. PONTIAC 400-455 COMPETITION ROTATING ASSEMBLIES. 875 inches and has a stroke of 3. Quality parts for Pontiacs. 1969 Pontiac Firebird design. **CELEBRATING 10 YEARS IN BUSINESS!** ONE OF THE COUNTRIES LEADING PONTIAC ENGINE BUILDERS - OVER 30 YEARS EXPERIENCE - specializing in concourse stock RAIV SD455 455HO 421, 389, 400's to all out blown alcohol race engines and everything in-between!!. 1967 Pontiac GTO. The 1970 and 1971 Pontiac Grand Prix carried on even after the man who kept the line alive moved on. It consists of letters A-L for month (A=January, etc. For a built proof bottom end, we also use a 1 pc rear main seal no oil leaks here. the pontiac w72 400 engine. PONTIAC,Pontiac 400/428/455 Flat Top - JE Pistons Pontiac 400/428/455 Flat Top. Big block Pontiac crate engines are also available in 428, and 455 versions. 6, is different (below left). Power steering, disc brakes, rear spoilers, and on 1970-81 models either a shaker or Turbo-style hood was standard. Note that the cylinder number 1 is the next driver in front of the engine (the same location on all V-engines) or just the first behind the power steering pump. With a wide variety of parts and modifications available, the Pontiac 350 crate motor can be customized to meet your horsepower needs. I have seen a couple companies that sale kits that cut down a 455 crank to fit into the 400 block. Specific fasteners are required and McCarty Racing can provide them. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head with the 72cc combustion chamber for higher compression engines. Be advised that a healthy 455 will destroy your stock transmission. Rival big blocks, 396, 400 (Chrysler & GM), 402, 426, 440, 454, 455, 460, etc. The 1970 Pontiac line up was composed of the base Firebird with 250 cid six, the mid range, 350 cid Espirit, the 400 cid Formula 400, and the 400 cid Ram Air Trans Am. Pontiac Engines Blocks Cranks Intakes. Unlike the second generation car which was almost a full-scale copy of Camaro, the first generation Firebirds have the unique front end. 6 liter) V8 or the Pontiac 400 (T/A 6. If your head has a large S1 cast into the the area where the rocker arms sit, don't get too excited. Crower Sportsman Rods are I-Beam forged from 4340 steel. Replied by Chevyman21 on topic Olds 455 Vs Pontiac 455 Vs Buick 455 @Andrew: Ya the Camaro never had the 454, but the 427, DZ302 and 327 were more than adequate. Builds the BEST stock to the highest Pontiac torque monsters on the planet. Only a true car racer/guy could understand. Re: 455 Buick or 455 Olds I'd go with the Buick, because I like em, and they are light, and the Huge bore coupled with the short stroke makes in my mind a better combination, also Edelbrock and TA performance have a wide range of parts available for them and if you pick up the latest issue of engine masters there is a Buick 400 buildup that may help you decide. The Pontiac 400 6. 1969 Pontiac Firebird design. #9799103 Pontiac 455 V8 Crank Shaft$400. Gasket Ultra-Seal Header Gaskets 400, 455 Pontiac V8 1968-1974 - Ram Air IV Heads. So i have a. ENGINES BLOCKS HEADS INTAKES CRANKS. However, these codes were used over from year to year. Pontiac 400, 428, 455 V8; 4. So, say, if you wanted a 350 hp engine, it was just simpler to get that 350 hp out of a 400 or 455, than a 350. Edelbrock P303 3-2 Intake for Early for Early Pontiac: 1967 400 - 428 4 BBL. Our shop has seen six 455 blocks in three years that sonic tested so thin that a sleeve was required to go. The letter is the month, next 2 digits are the day and the last digit is the year. Both have been infused with Pro Plasma Nitriding Treatment. We've touched on Pontiac engine performance previously, back when we covered aftermarket crankshafts and stroker packages available for 350, 400 and 455 Pontiac engines. 75 inches, making it really 354 cubic inches instead of 350. 760" h-beam rod w/arp 2000 bbc pin chrysler 440 6. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6. 8 rod combo is the most popular, stick with what works. what i have seen with pontiac the pontiac 350 will kill a pontiac 400, i think the pontiac 350 is also a big block. will not fit under all pontiac stock hood. Engine Codes & Production Figures.