Im using SRP flat top pistons, they are .022 below deck. steel shim head gasket, .019-.020. Quench appears to be near perfect. The car is a 68 Charger, 4 speed , dana. I have a choice of many gears from 3.55s all the way to 4:88s. Im in a catch 22 position, I want to run HP exhaust manifolds and I think about 242 duration @.50 would be pushing it with the manifolds (According to AndyF and his tests).More cam might kill the bottom end!