1974 Duster wheels & tire size

I had a 70 Duster w/SB and bought a set of 15" ralleys through summit 2 - 15x7 and 2 15x8's for the rear with 215/60/15 front and 275/60/15 on the rear (don't remember the back spacing-just ordered 7" and 8") they didn't rub and it had a 440 with fender well Super Comp's. Had an amazing stance!