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 is the cast number on a Pontiac 400 block?
The Pontiac 400 block was cast with revised motor mount bosses, and will only mount in late Firebirds or Grand Prixs. The blank casting number for the 1977-79 400 is #568557. The 301 can easily be recognized by the lateral oil filter location.
Where is the engine number on a 1969 Pontiac block?
This number, 9792968, denotes a 1969 428. The number is located next to the distributor hole on earlier engines. Non-389/400 engines featured an identification or transfer lug on the rear passenger side of the block. The exceptions to this were the 1961-62 421 Super Duty, and the 1973 455 Super Duty engines.
Where is the displacement stamp on a Pontiac engine block?
There is no displacement stamp for 421, 389 or 326 blocks. To further identify the year and application, move to the top and rear of the block, where the distributor is mounted. Here you will find the date code and block casting number.
The Pontiac 400 block was cast with revised motor mount bosses, and will only mount in late Firebirds or Grand Prixs. The blank casting number for the 1977-79 400 is #568557. The 301 can easily be recognized by the lateral oil filter location.
Engine CodesFred Schramm2020-06-10T22:36:44-05:00 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. Together with the casting code and casting date you can determine where what the engine is.
Where is the engine number on a Pontiac 350 HO?
This year designation must be seven, eight or nine to be a 350 HO engine. Find the engine block casting number on the rear of the block, behind the number eight cylinder. This number must be the same as the production number, #9790079, originally located in Step 1.
This number, 9792968, denotes a 1969 428. The number is located next to the distributor hole on earlier engines. Non-389/400 engines featured an identification or transfer lug on the rear passenger side of the block. The exceptions to this were the 1961-62 421 Super Duty, and the 1973 455 Super Duty engines.