For what it's worth.. Here's what fit my '70 Fairlane perfectly.
Front:
17x8 (4.5" bs) with a 255/40/17 Nitto 555 tire
Back:
17x9 (5" bs) with a 285/40/17 tire
Fit perfectly with a fingers width between the quarter lip and the tire. I could have gone 295 in the rear by rolling the lip or adjusting the BS to push the wheel inboard (had a good 1.5" clearance on the inside).
The 255's up front have tons of room and still maintains great turning radius.
Picture: