I am going to buy a cc test kit and check and post what the actual cc's of the chamber, stock piston ect really are. With a little math we should be able to figure out what volume the chamfer is and what it costs in compression. Even though my 1980 truck engine has a advertised compression of a blistering 8.25 to 1 I bet reality will be lower. Probably be lucky to break 8 to 1 in the real world. Jay 6155
