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?

 

You dont want to go with thicker gaskets, it is going to increase your quench distance considerably.. although if you really must, you can get a shim gasket to stack on top.

 

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.

 

http://www.turbofast.com.au/TFcomp.html

355 = 4.030 bore / 3.48 stroke