Best B.O.P. stock and super stockers of all time

[Stan Weiss]

Originally Posted by oldskool

Yeah, the factory 428 pistons had a small dish, to reduce CR.

BUT, I noticed that the NHRA specs describes the 428 pistons as "Flat w/notches". Don't mention a dish.

http://www.classracerinfo.com/Engine...0&MAKE=Pontiac

But, in order to get a piston made that NHRA would approve, I assume it would have to be made very similar to the original, including the dish.

But if not, stranger things have happened, concerning NHRA rules.

Look at the next 2 columns after Flat w/notches. Dome/Dish Vol and Dome/Dish Hgt where it says No Spec.


Stan