Jim, The wheels I'm running are custom made rodster wires. The original steel wheels are 15x5s with 3.75 back spacing for 56 fords. My wires on the front are 16x 5s with 4 inch back spacing and keeping the 215/70R 16s from rubbing the upper ball joints. The 3.75 back spacing may do better, not alot a room playing around with the upper joints.
The rears are 16x6s with a 4.25 inch back space which helps on putting on bigger tires for a more aggressive stance. Rear tire size is 225/70R 16s. If going for lower stance tires such as 65s or 60s you should be OK on the rear.
On the front keep the 3.75 or drop to 3.5 back spacing and I think you can go with a wider wheel say 5.5 to 6 inch just keep in mind you don't want to hit the fenders in a tight turn.
-Gary Burnette-
