Late model 17/18" wheels with ford 8.8 on 72 duster

I have searched but cant see anything pertaining to running a mustang wheel with 5-7inch backspacing with ford 8.8..... Would I be better off goin with a b body rear? I would like to tuck the largest tire possible.... really would like to stay away from the large spacers.... I will be doin a rotor swap on the fronts to larger bolt pattern... Thanks in advance