OK so I was wondering what size wheel and backspacing would I need to put a 29x12.50 micket thompson sportsman street tire on a stock width 8-3/4 in a 68 dart? Anybody running a combo like that? I was guessing a 10" wide rim with a 7" backspacing? I have measured from the frame out to the lip on the qtr and its 0ver 15" wide so should be plenty of room with the right wheel and tire combo. Thanks in advance for any input.