Another approach, similar to HRL, that hole is pretty large and you should be able to get in there with a small round head die grinder bit or dremel tool and grind almost straight down to grind out whatever that is that is in there. Then drill the hole out to a larger tap size for a bolt, tap the hole with a bottom tap for threads. Use some red loctite and install a bolt. Cut the bolt head off, leave some material proud of the hole, center punch it, drill it to the correct size for the valve cover screw, tap the threads, then cut and grind it flush to the head, a small chamfer and maybe just a quick clean out of the threads with the tap.
Last edited by Dragsix; 04/04/2024 12:38 PM.
