Rear end swap

Would anyone be able to offer an opinion or share any experience. I am trying to find out if an 1980 Dodge Aspen rear end will work on a 1969 Dart. My Dart has the small bolt pattern and we want to swap that out.

Alternatively would it be possible to weld over and drill new stud holes on 4 1/2 centers on existing hubs and drums?


Thanks for your time.