Rim Selection

Looking to buy rims for my duster. The rear tires are 275/60R15. I am looking at U.S. Wheel 37-5812 or 37-5812P. Both are 15x8 but one is 4.75 backspacing and the other is 3.75 backspacing. Anyone have any input on which will fit better? New rear springs with 2 inch lift. No other rear modifications.