On my 340, I replaced the heads with 1.88 valves with 1971 heads with 2.02 valves. I was going to use the Felpro cork gaskets from the gasket kit, but I noticed that both heads seem high in the center, so when I push on one end of the valve cover the other end has a gap.
Has anybody else encountered this situation? If so, did thicker gaskets solve the problem and which ones work best?
Has anybody else encountered this situation? If so, did thicker gaskets solve the problem and which ones work best?