It's complicated. The donor vehicle is on a 1971 pan, with the ball-joint front end, but the rear trailing arms have been
boxed butchered to the point I can't even get shock absorbers on it. It seems easiest to swap out the trailing arms and use the swing axles.
I
could convert to double jointed axles, then with traverse leaf or quarter elliptic springs I could suck the rear tires in and make my dream vehicle:
