The caliper clearance problem can usually be solved with a thin spacer plate between the hub flange and the wheel. Not the Mickey Mouse cast aluminum deathtraps with the separate studs, the flat discs that slip over the original studs. I used spacers on my RAM 1500 when I swapped to 16" wheels from the original 17s. The shorter wheel/tire combination gave me a better highway cruise speed with the engine at its RPM sweet spot. The OEM wheels had me cruising at 75+ MPH, which was an invitation to a speeding ticket. Better gas mileage also, without the torque converter toggling in and out of lockup constantly!
Jerry