What Wheel Backspacing for an F-Body 8.25 in an A-Body?

Took a while, and I forgot that I had this thread going, too, but got everything bolted up, and on the road. Wheels are 15x7, 4.5" bkspc and I fit 245/60 tires on them. I redid the springs with Durango parts, which gave me a lot more height out back, and I think without it, I would have a little interference, but nothing rolling the inner fenders couldn't fix