340 Piston and Valve Question

4spdragtop said
I would imagine rocker setup would come into play? Cam lift also? I'm still learning... thus the question marks lol

yellow rose said
That’s better than most are. They SHOULD be above the deck. Gasket thickness will be determined by what compression ratio you need or want.

The only way to know for sure what the CR is is to do a 1/2 down fill, CC the heads. And then don’t let me do the math! You need to measure everything and not guess.

Thanks. I just got the heads back from the machine shop and they CC'd at 66. I know the pistons from the factory were .014 out of the hole and the deck was milled .010 so theres the .025 out. May I ask procedure for 1/2 down fill? I believe that the pistons are 10.5 to 1 but that will be determined exactly by the gasket thickness? Thanks