Is The Pontiac 428 A Big Block?
Is The Pontiac 428 A Big Block?. Since that time it has been used as a performance engine in several cars by drag. The engines that are currently most popular were manufactured from 1964 through 1978.
The engines that are currently most popular were manufactured from 1964 through 1978. Pontiac bore & stroke figures. Since that time it has been used as a performance engine in several cars by drag.
Because The 428 Was Used Only In Large Cars Like The Gto And Firebird And Featured Prominently In Nascar Stock Cars, It Was Quickly Replaced By The Pontiac 455 In 1970.
A 428 was cast on the side of the block and in the lifter valley was a 28. There is no displacement stamp for 421, 389 or 326 blocks. Stock bore 3.720 3.750 3.00 30 over 3.750 60 over 3.780 350 cu.
This Added Rigidity And Helped Establish A Reputation For Strength And Durability In Later Highperformance Versions.
This is a quick block id for junk yard hunting, etc. Stock bore 3.875 3.750 3.00 30 over 3.905 60 over 3.935 389 cu. They were designed to power big, heavy cars;
The Exterior Dimensions Of All These Engines Are The Same.
It was one of the largest engines pontiac produced, but it was used more to power big cars such as the bonneville, and not as much for performance cars such as the firebird. The 421, 428, and 455 are 3.25 mains. Stock bore 4.062 3.750 3.00 30 over 4.092 60 over 4.
Buick And Oldsmobile 455S Were Big Blocks, But A Pontiac 455 Was Not.
A chevrolet camaro 396 had a big block, but a pontiac firebird 400 did not. You must find the date code at the back lh side of the block first. Also bowing in 1967 was the new firebird, which had the 326 as its base v8.
The 389 And 400 Blocks Will Not Have This Lug.
Assembled, dyno tested and tuned so nice your. The 428 cobra jet and super cobra jet continued to be offered through the 1970 model year, including under the hood of the shelby gt500. These engines were available in the following cubic inch displacements:
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