Quote:So if this is right then this piston will be - .072 in the hole before decking the block right? Bore Blck Comp height 73cc 232453 4.375 10.699 1.858 10.1 Dome Vol Gram weight -28.9 710 grams What would compression ratio on this be with a 75cc head and a .20 head gasket with surfacing .010 off the block????