Front Rubbing - Tires, Suspension or Wheels?

Your 215s are 26" tall. Centerline only lists 3-3/8" backspacing for the 15x7, so probably correct. With a 15 the max backspace you can run is 4.5" to clear the UCA. 26" tall on an A-body will not clear the front edge of the fender unless it is tucked enough to miss it on the turn in. 215/65 might work with more backspacing. I ran a 17x8 with 5.5" backspacing on my '68 Barracuda with '75 disc brake spindles and Cordoba rotors. I had to run the "short" ball joint to clear the wheel. With a 245/45-17 everything cleared. The 245/45-17 is listed at 25.7" tall and it BARELY cleared the fender at the front edge. With a little slop in the strut rods AND the wheel turned it occasionally would just rub the edge of the fender when backing out of the driveway.