Originally posted by 6-speeder
need some help lowering comp.are there any thicker head gaskets than .060?if so who makes them?right now i got a 355 with 12.39to1 im trying to get it to run on pump gas.buying different pistons is not an option,the motor is brand new and i got a deal on the pistons.how much can a 72cc head from 64cc drop the comp?
I dont think you can get a thicker head gasket aznd adding a shim is just asking for leaks. The only way without changing the pistons is getting a larger chamber head. The ones you said shold be half a point or maybe even a point drop.