Okay, for all my mopar life I dropped in a BBP 8 3/4 to do the conversion, now I have a 68 dart and don't want to change out the rear end, even if I could find one here- how do I make the BBP swap on the rear of this old dart? Buy new axles?
I'd have the axles and drums drilled for the new bolt pattern. If you use screw in studs it'll leave more metal around the holes, and be stronger. 7/16" screw in studs will leave even more!