8.25 rear end for a 73 Dart

I'm looking to upgrade the rear end on my 73 Dart to an 8.25. It looks like there are a few year models of Jeeps that I could pull one out of with some slight modifications - but if I can find a straight drop-in replacement that just needs new gearing that I'd rather go that way. I'm in North Texas and I'm happy to do a bit of driving to get somewhere or figure out shipping through a freight service of some kind

Thanks in advance.