If you have a BBP disk brake set-up from a 73 & > A-body, the 15x7 wheel with a 255/60-15 tire won't work. The front fender will rub on the tread of the tire. Using wheels with a 4¼" offset, IMO, the tire was too close to the springs in the back (~¼" clearance). The axle was a stock 7¼. A 235/60-15 works, but there is not a lot of clearance in the front. Sometimes the tire bottoms out in the wheel well.
