drilling wasnt working, i punched the center og the plug through the threaded sleeve. the hex head was broke off to begin with. its fully threaded. after i had that hole, i slid an easy out in it, but didnt like it.. too stiff. dad gave her a try and well... now i need new head gasket set.. any problems to watch out for when pulling a head, if its simple i may do them both to clean off carbon and such.... any snags i should be looking out for?