325/50-15s will fit in the tubs, with a little massaging and no air-shocks, lol. But you will need to move the springs and get some custom bs wheels. And you will have to slow down for the turns. If you narrow the rear to the limit of the new spring location, then you can run off-the-shelf 4.5bs wheels.
295/50-15s on 10s are an easier fit,and you can powerslide to your hearts content.
275/50-15s on 8.5s are a bolt-on deal with a 4.5bs
