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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!

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dont believe everything you read,those tests were with 1973 400 manifolds,and unported also. i have custom ground solid cam for fast class type car hp manifolds/powerbrakes 550/540 lift 112lsa that i dont need now. had close combo 440 like yours 40 over 440 ross flat tops/big valve 915s,all stock trim. now went of the deep end 500 inch 440 with roller cam 602/603 lift252/257 duration@50 114lsa still gunna run manifolds and power disc