What Cylinder Heads?!?!

My .030" over 383 has a set of 516's on it, with a light mill, nail head valves, 1.74" exhaust, and a -.020" deck height,with a .039" head gasket, it makes 9.97 to 1 compression with stock flat top pistons. The downside is cam clearance, which will be limited to around .500" lift, but if thats not a problem, you can get decent compression pretty cheaply. If you have to run either head in totally stock form, the 346's flow better.