Need Some Advise

I can race with 235/70/15 on a 7 inch steel rim if I have to. That is with a B-body rear, using the stock spring hangers, and I think it is a 4 inch backspace. Skinnys up front on a 4 inch rim. Hooks fine with the tall 70 series.
Moparlee, do you drive that spool on the street?