Torq Thrust D 15x8.5 rear wheels

Looking to put a set of 15x8.5 Torq Thrust D wheels on the rear of my Duster, with 3.750" backspacing. The tire is a 255/60/15. Should I be okay and not in danger of not fitting or rubbing, or should I move down to 15x8?

I am in the process of putting them on my Demon. they look like they are going to clear with a 28x10.50 slick but not 100% because I haven't driven a car with them on. Pictures in my thread Ratty 71 Demon