Me and a buddy almost bought this dragster just to mess around with. The hole in the valve cover really drove me away as I didn't know how long it sat like that or how it happend. Excited to see what comes next!
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Haha! That was one of the first things I saw and thought too. Looks like it was from an external blow snapping the bolt off rather than from inside. Not being a CB750 guy I was impressed when i took off the rocker box and saw how those threaded bosses were welded in place from the inside to hold the camshaft towers down. It should be an easy fix. Fingers crossed.