flattop 360

The stock 360 dished piston is around .088 in the hole and the dish is 8cc. An X head chamber volume is 68-76 cc depending on what valves you use (maybe 68 with performance flat valves) , nail head increase compression, dished valves taketh away. They are all a little different so use a calculator with these values to determine what with a dish and 8.9cc gasket. Some flat tops are 1.576 compression height so you can plug that in too. It all depends....reported 8.37 with 67cc heads and stock pistons.