I've recently found a great deal on a set of Greg Weld star wheels, the rear wheels are 15 x 8 with 4.5 backspacing. What size slick can I use? What mods would be needed? Currently the car has stock wheel weld and fender lip. Will a 275/60/15 drag radial work with these wheels? If so, would I need to modify the fender lip? Thank you