so after checking 2 chambers 2x with a spark plug im very confident to say I got 114.5cc chambers on these 820 casting heads
So if I average the piston down the hole I would call it .015 , so im looking for a head gasket from .025 to .030 to keep my quench in check considering im right at 10.5:1 comp ratio I proabably want to keep the quench as tight as possible to avoid detonation
Looks like the only 2 options are cometic or copper , gmpp used to make a .025 but it looks like its discontinued , can anyone add anything ? feels good to get these measurements finally done !!!