Should I do 1.800 comp height pistons and then deck the block so it’s true which these pistons are around 9.7 comp with 64cc heads. The heads I have are 65cc closed chamber and then I’ll use .039 fel pro gasket for its reliability
Id say yes. It looks like that would up the compression. What casting are the heads? 273-318 or 340-360? the intake runners etc. are different between the two families of head but its all about cfm if you can get the flow its all good.