Well, I think that fixed the leak at the rear bolt on the head with some sealant. however, I still have a leak at the back of the head. I had to pull the valve cover off to verify the cam timing and I re-installed the valve cover with a new gasket after cleaning the sealing surfaces and using Permatex #2 sealant. It was the Fel-Pro cork type gasket and I think I may have pinched it when I installed it. I have a factory aluminum valve cover with one piece rubber gasket that came off the other engine versus the stamped steel one that is currently installed. Is there an advantage to the aluminum valve cover? Can I re-use the rubber gasket with new sealer and what sealer would be recommended? Thanks, Don.