The reason I’m even going down this road is because the lower bolt mount hole is wallowed out, the top threads are stripped, and there’s a super thin cheap insert circa 1992 or so in there. The alternator actually sits at an angle, but functionally sound. Nonetheless after making an executive decision, I went with the NAPA lifetime unit. The main reason is all the ones I found were $200 or so, 55amp and not the correct 61amp including-including the current one. Also, I only drive the car a few times a year, but maybe more now. Anyway, for $80 and a lifetime warranty I’ll live with it. Upon further examination, it’s a GM housing with the stamp still on it. 1100839, 42amp, 9G23. If someone can let me know the the vehicle this was originally destined for, I would appreciate it. Being a July 23rd build date, I wonder if it got installed before the next model year. I didn’t see this as a warranty replacement part I’m my book and the interwebs never lie. My search turned up Chevelle (because they always do), Nova, and Full Size cars. It could be from a truck too. Either way, I’ll put the bolt through the mount hole first to make sure it’s good.