motopunk, 72 on the piston.
ok. same size, that i also want to go .. could the stock head gasket being modified?
on my 360 engine, we had to made an o-ring for the outside and a copper ring on the inside.. there is very less space to the studs like you could see it in the pic. left is the 360 with 78mm bore, right is 03 250 cylinder...