budget dana 60
Not sure what kind of power or times your car runs, but you should have bought Strange components for the 8 3/4, and it would likely still be going.
I think I have $1,000 in the rear end in my Dart. Has a 4.86 pro gear, 35 spline Pro Race axles, and a Strange spool. That includes the bearings and such. Leave at 3400rpm on a transbrake, and 60 fts mid 1.40's. No problems in two seasons.
I know the Dana is stronger. I tell people that all of the time. Its also heavier and takes a little more to turn than the 8 3/4, but maybe your car is too much for a well built 8 3/4.
Dana's are cool to have in a car, and you cant hardly tear one up. I just never have broken an 8 3/4 in anything, so I stick with them.
Good luck with the Dana. You sure got a good deal.