73' B3 340 Duster pro touring build

im running that size on stock bullitt wheels on a stock style front suspension. dennys should let you go even bigger by what im seeing from pics.

You'd better ask Denny on that one, there was alot of R & D involved here just to get the 17" x 7" to work...of course that's due to my stance, if you have lower profile tires (AKA Mustang stuff) all that changes.