[68c10owner]

alot of "builder" pistons do come up short in the deck height dept. Not sure why exactly, probably as mentioned about having the blocked decked and keeping a "standard" deck.

To my knowlenge all performance pistons hyper or forged are speced at .025" unless specified different by the manufacturer.


Now, depending on deck height and gasket thickness flat tops will get you closer to 10:1. If you want to keep it under that you`ll need a small dish piston. Look at the Gm 350HO vortec motor. They run dished pistons and are listed as 9:1. I don`t know off hand what head gasket they use but if it`d not the steel shim .015-.018" gasket then using this gasket will get you about 9.5-9.7 but again it depends on gasket thickness and deck height. also, alot of vortecs cc out at 66cc`s, not the 64cc`s they are listed as.