Quote:
Originally Posted by b-man
Correct.
By that time the factory only used dished pistons on the 428 to maintain the same compression as 400 engines using the same heads.
Otherwise no dished pistons since the late ‘50s early ‘60s export engines with 7.6:1 compression.
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It is my understanding that the lo po base 400 2 BBL (8.6:1 advertised) used in full size Pontiacs used different pistons. Am I misinformed? I see now that they are not dished as I previously stated. Apparently they are different however?
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