Go to United Machine, KB web site and use the compression ratio calculator to find out exactly what true mechanical compression ratio you will get with flat top pistons with valve reliefs, 80..0 CC heads and a .039 or .042 thick head gasket with a 4.40 bore size scope
You may need a 10 to 12 CC reverse dome, half dish piston to keep the compression under 10.5 to 1 or so for todays pump swill scope

Last edited by Cab_Burge; 03/31/18 03:33 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)