So I may have blown up my stock rear in my car last night. I'm going to take it apart to see exactly what broke but I'm thinking of upgrading anyway. (741 open diff with 2.94 gears) I was thinking about using a 489 case in an A-body width 8 3/4 housing as a "poor mans" narrowed rear to make more tire clearance. I didn't think they were much narrower but a local guy with a 67 Coronet said that's what he's running and fits a 315/60-15 with a mini tub and relocated springs. My other option is possibly a Dana for strength. The problem is trying to find one that is already set up for a b-body , or getting one out of a truck then cutting it down and building it anyway or buying an S60 from Strange which are all expensive options. I do like the removable third member of the 8 3/4 and I don't think you can get a smaller gear than a 3.54 for a Dana. I want to stay between 2.94 and 3.23 ideally. Or... for now I can just fix whatever is broken in my rear and maybe put a 489 case and posi unit in lol. Basically is an 8 3/4 worth putting money into to hold up to high horsepower and torque levels (700-1000rwhp) or is a Dana required?