I ended up buying Wheel Vintiques Mopar Rallye rims. 15x7 with 4.25 backspacing with 255/60-15 in the back and 15x6 with 3.75 backspacing with 195/65-15 for the front. Plenty of clearance from tire to leaf spring, however, I did have to trim the inner fender lip about 1/4". There was room, but I felt a little more was better.
