OK...I have Edelbrock heads and cast aluminum valve covers with studs and nylon insert locknuts.
From my old school days I have always used the basic cork gaskets (usually buy the Fel-Pro 13049C, about 1/8" thick) glued with 3M "yellow snot" to the valve cover and a light coat of grease on the head side. They work ok, but periodic I have to tighten them to stop the weeping and replace them because they get thin and hard.
My local NAPA guys suggested trying the Fel-Pro rubber gasket 13049R (1/8" thick) or the Fel-Pro performance cork gasket 1632 (about 3/16" thick). They think either one will be more resilient, seal better and last longer.
Anybody tried either of these? Better success with the rubber or the thicker performance cork gasket?
I also found some postings here on CC about a 5/16" cork gasket sold by DSC Motorsports. Is this thicker gasket better?
And....these look interesting. Has anyone tried them?
http://www.realgaskets.com/
Rodger