ksurfer2
Well-Known Member
To increase my compression a bit, and get a better handle on the internals of my engine, I am looking to replace my head gaskets. I have a 440 based 512 using a 440 source kit. I have searched but cannot find the proper bore size I should be looking for. I plan to go with a Cometic gasket. They have a .027 thick gasket in a 4.250, 4.350, 4.410, and 4.500. Which would be the proper bore for my application? Any help would be appreciated.