Have my explorer 8.8 mocked up in the car, (1970 Dart) with 2005 and up mustang wheels (17x8, 6.3 bs), springs moved in 1/2" per side. The wheels are centered in the wells and 275/50/17's fit a little tight but may work. I chose not to narrow the rear - 8.75" pinion is offset 1 1/4" and 8.8 is 2" - thought about taking 3/4" out of the rear to put pinion in factory location, but new wheels seemed to cure that and the difference in pinion location (side to side) is 3/4" which equals about 1 degree which shouldn't hurt driveshaft angle.