225 slant 6 vavle cover?

and use a cork gasket not the rubber... i have never gotten a rubber one to seal... even with silicone lol...

with the cork one just put a bead between the valve cover and the gasket... assemble it... then next time you need to run the valves or whatever your gasket comes off with the valve cover, usually get 5 R/R out of them before they leak...

im at 7 on mine right now lol...