what 8 1/4 rears will fit

We have used ones from the Aspen/Volare' family with good results. even under small fender Valiant/Darts using 7 inch rear wheels with a 4 1/4 to 4 1/2 rear backspacing.
Duster/Demon have much more clearance. Cheap too.

Are the spring mount locations the same (width between them) as an A body, or did you need to move them???