I put 275/60-15 on 15x8 on 4.5bs under a 72 Duster. Stock 8.25 with stock leaf spring location. Sometimes rubbed the spring and the inner wheelhouse a little. Had no trimming on the wheel opening and never rubbed there. I did put a thin shim between the spring hangar and body to move the wheel back a little.No plans to mini tub it, would just like to be able to fit a 275 tire. That possible under a stock wheel well Duster? Maybe trimming / rolling the fender lip, but no modifications to the inside portion of the tub.