ITh4n4tosI

So I can't seem to find an answer on the g-body forums but basically I have a 1981 regal with a c5 corvette brake conversion 325mm up front and a 8.5 rear end swapped in the back. I would like to run 17" or 18" to clear the brakes but I don't know how much wheel and tire I can fit and what backspacing to run to clear everything. Any help is appreciated thank you