When was the 4X head installed on a Pontiac 400?
Look at the other end where there is a lone un-drilled raised machined boss. This is where there will be a stamped number. The codes are listed below. The 4X head was installed on the 400 and 455 during the mid 1970’s. Most I have found are 455 stamping. 3H 2.11/1.66 valves 98/101cc’s.
What kind of engine block does a 1970 Pontiac 400 have?
Has good .040 bore. #9792968 DC K168 (2). 370 HP 4-bolt main. 1970 Pontiac 400 Auto YS Code Block $1275. Cleaned, magged & ready to ship.
When did the Pontiac 6x head come out?
The 6X head was mounted on the L-78 400 cubic inch displacement engines between 1977 through the final installment of 400 engines in 1979. However, it appeared to many that the Pontiac 350 engine shared the same head with the standard L-78.
How many horsepower does a 1978 Pontiac head have?
Year CID Advertised HP Head casting # Valve Sizes intake/exhaust 1978 350 ALL 6X-4/ 6S 2.11/1.66 1978 400 180 hp 6X-8 2.11/1.66 1978 400 220 hp 6X-4 2.11/1.66 1979 301 ALL 01 1.72/1.50
Look at the other end where there is a lone un-drilled raised machined boss. This is where there will be a stamped number. The codes are listed below. The 4X head was installed on the 400 and 455 during the mid 1970’s. Most I have found are 455 stamping. 3H 2.11/1.66 valves 98/101cc’s.
Has good .040 bore. #9792968 DC K168 (2). 370 HP 4-bolt main. 1970 Pontiac 400 Auto YS Code Block $1275. Cleaned, magged & ready to ship.
When did Pontiac start putting extra numbers on cylinder heads?
In 1973 Pontiac started stamping extra numbers (1/4″ tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers.
What kind of cylinder head does a Pontiac V8 have?
Cylinder Heads, As-Cast, Assembled, Aluminum, 72cc Chamber, 215cc Intake Runner, Ram Air IV Port, for Hydraulic Roller Camshaft, Pontiac V8, Pair
Where are the bosses on a Pontiac cylinder head?
Looking at the head from the exhaust port side, there are two drilled bosses for an A/C bracket on the passenger side (over the end exhaust port) on 4X or 6X heads. Look at the other end where there is a lone un-drilled raised machined boss.
Where can I find the Pontiac cylinder head ID number?
Pontiac Cylinder Head ID Numbers Pontiac Cylinder Head ID Numbers About Contact Parts For Sale GM FoMoCo MOPAR Gaskets Ignition & Small Electrical Items Light Bulbs Owner’s Manuals Seals
What was the last year a Pontiac cylinder head was made?
Popular Hot Rodding (1970-1979) Popular Hot Rodding (1980-2007) Rod Action (1972-1992) Rod & Custom (1954-1959) Rod & Custom (1960-1969)
What kind of cylinder head does a Pontiac GTO have?
1967-79 Pontiac Factory D Port Cylinder Head Bolts Bolt Set 400 455 Ram Air 3 HO (Fits: Pontiac GTO) Only 1 left! Only 1 left!
When did Pontiac start stamping cylinder head numbers?
In 1973 Pontiac started stamping extra numbers (1/4″ tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers. *All rocker arms are threaded beginning with Motor Unit Number 709986 assembled on or about May 7, 1973.
Where is the displacement stamp on Pontiac 428 block?
On 1968–69 428 blocks you will find “428” stamped between the freeze plugs. On blocks produced in 1970 and after, you will find 350, 400, or 455 stamped towards the left side of the front of the block. There is no displacement stamp for 421, 389 or 326 blocks.
What kind of head does a Pontiac head have?
PONTIAC HEAD CHART CASTING NUMBER YEAR & FACTORY APPLICATION CHAMBER VOL# CC’S NOTEWORTHY ATTRIBUTES 528511 1958 370 62 1.88/1.6 55-60 INT MAN 538177 61-62 389 62 1.88/1.6 61-64 INT MAN 543797 63 389 62 1.88/1.60 9770716 63 421 HO,64 GTO 65 1.92/1.66
What does the block code on a Pontiac engine mean?
Pontiac engines have block code. This code will tell you the year it was to be used. However, these codes were used over from year to year.
What are the cylinder ID numbers on a Pontiac 400?
Pontiac 400 428 455 Engine Casting Numbers Pontiac Cylinder Head ID Numbers Printable PDF What are you looking for? Back to Top Work in Progress WIP: 1941 Pontiac Business Coupe
What is the casting code on a Pontiac?
Together with the casting code and casting date you can determine where what the engine is. Starting in 1965 Pontiac began using a 2 digit letter code. As a general rule, “W” coded blocks are manual transmission and “Y” coded blocks are automatics.
Where is the engine code on a Pontiac 400 428 455?
Pontiac 400 428 455 Engine Codes. This is a quick block ID for junk yard hunting, etc. You must find the date code at the back LH side of the block first. The letter is the month, next 2 digits are the day and the last digit is the year.
What’s the stamp code for a Pontiac 400 block?
I Have a Pontiac 400 block im going to start building, stamp code is 481988 (71-74 block) I have a set of 1968 6X-8 heads. With some forged internals, a nice bump stick and general Pontiac machine work should I be able to run pump gas and make 500hp? Should I do some elaborate porting on the 6X heads? have access to a highly advanced machine shop.
When did Pontiac start using the number 8 block?
Beginning in 1968, Pontiac located the block casting number on a ledge just rearward of the number-8 cylinder. Many numbers were available. This particular block, number 488988, was used in late-1974 400 applications and contains all the desirable characteristics for performance use.
What’s the casting number on a Pontiac 400 engine?
The svelte 400 block is easiest identified by its 500557 casting number, and lacks the durability required for high-performance applications. When searching for a stock block, purchasing a complete and running engine is fine so long as you’re aware that you have no way of predetermining the block’s condition and capability.