“I have a 1971 GTO. 400 auto. Would like to buy your stroker kit. I would like to use 1969 48 heads. A compression ratio for the street on pump gas. Heads are 72 cc. What additional information would you need?”
We like to stay around 9.5:1 on cast iron heads and be pump gas friendly. Since your heads are 72cc you would need a dish piston. We can help in two ways. One, we can figure the dish size for you or you can use our compression calculator to get the dish size based on your specs.
