Installing one wire alternator

Am working on the heated bolt option (welded nut or induction heat gun), but rig is currently parked (and now immobile) in a hay barn.........where just about everything is flammable. Would have to be very careful to go that route.

Meanwhile am I correct to assume the timing chain cover is more or less a universal fit over a number of years? Even if we get the bolt out, we may be pulling the timing change cover to inspect chain for wear. Gone this far, may as well take that final step. But if we can't get the bolt out.......or it gets snapped off again) and cover is trashed, need to have a backup plan ready to go.