Don, what caused you to get away from Right Stuff on your valve cove gasket? I've never used it and followed your post about it with interest.
When I found a silicone gasket for the 216 rather than a cork one. The two offset bolts seem to not have enough force to press into the gasket before they start caving in. So I resealed it with RightStuff on the ends. Did a lot of driving today and everything is sealed and I’m off to a good start.
The no gasket RightStuff sealed really well until I desired to paint the engine and took it off
Don