Rear Axle, Which Method for Bolt Pattern Conversion...

You could find a 7 1/4 from a 74 and up V8 car with the BBP and just swap out the rear. I have one that I'd part with, but you're too far away, lol.
So as long as I don't plan on dropping a V-8 in there, a 7.25 will hold up? (Considering it cannot spin the wheels on dry pavement unless I'm turning from a stopped intersection going uphill...)

Edit: Plus, one of the bearings back there has been making noise as long as I've had it, although it does not seem to have gotten any worse.