I am having a problem with some slight rubbing of the front tires on my '75 Duster against the front and rear edge of the wheel arch at the very bottom of the fender during cornering. The car is a '75 Duster with a '77 400 big block; the front wheel tire combo is: 15x7" Cragar series 342 black "D-window" wheels with 4.25" backspace, Firehawk Indy 500 white letter tires size 215/65/r15. This is the smallest size offered in the firehawk indy 500 with white lettering and the largest backspace offered on these particular rims, and it still rubs slightly.
I want the fronts and rears to match; short of buying a whole new set of wheels/tires, is there anything I can do to address the rubbing?