Im looking to put some new rims and tires on my 85 Regal. I was wondering if anyone has 15-10" rims on there regal? If so whats the backspacing, and what tires are you using? I want to use M/T et streets that are 30-13.5-15's. Will I have to relieve the frame or run less backspacing? Just wondering if anyone has run this combo? Any suggestions on other combos? Thanks, Tom