I put 15x7 rallye 1's on my car, and no problems. I believe they were 4" or 4.5" backspacing. BF Goodrich TA Radials, 235 70's on the front and 275 60's on the rear. The front of my car sits higher than stock, but I wanted it that way.
66 & 67 rear diff's were different lengths, don't know about 65 or 64.
All good things are worth waiting for. "Yeah right", I want them now!
"Artificial intelligence is no match for natural stupidity".