I like the cork,I have good luck with them. Glue them to the cover with a thin film of sealer. VERY lighty bolt to the head just so the gasket seats against the cover. Let it dry then install for real dry on the head side. Have removed the covers many times never leaks. Just don't over tighten them.

best of 11.39 at 117 mph 1.60 60’. 68 340 S Barracuda Fastback F.A.S.T [IMG]http://i67.tinypic.com/2mnnnnt.jpg[/IMG]