What Wheel/Backspace/Tire size for you who are running a Ford 8.8" rear end?

I don't know about the width on the ford rear, I assume you could trim it to stock width - but I am runnig 12 x 15 wheels with 6" backspace and a set of 29 x 15.50 x15 M/T on my cuda and still have 3" between my sidewall and my frame rail