Bone stock. Truck used to be 2wd so probably 5.5" (I never measured) The problem is wider tires hit the fenders and suspension (I had 255/85R/16s on it before with ZJ alloy rims. No way it could offroad or turn as sharp as with the 33/9.50/15s)
The wheels are identical on both, you could have either. If you can describe them I can answer your question more definitively. So for steel wheels, are they 5 spoke, 6 spoke or just have an array of rectangular holes around the perimiter?