I have a chance to get some Cragar S/S mags and B.F. Goodrich tires at a real good price. They are almost new .15x7 fronts with 225 60-15 and 15x8 rears with 255 60-15.The fronts should fit but I am concerned with the rear tires.The 76 sits high with heavy duty spings.Fronts have 4.125" B.S. rears have 4.25".Thanks

Fronts will be fine, rears close to rubbing under heavy suspension compression. I have 255/60 on 7" wheels with 4" backspace and they will clear the fenders if the rear springs ever settle to a normal height. The photo in my signature is before the spring change with the 15x7 - 255/60 combo. Your rear wheels would have about an inch more to the outside.