I went with a 285/40/22 due to the truck being AWD and wanting to fill the wheel well. Those things are very tight.... I rub the wheel wells when I bottom out and had to roll the front fenders. The spindles had to be ground as well.
Well its up and running once again. This past weekend I rebuilt the front suspension as after I put the 408 in the wheels had severe camber. I figure if I am getting the alignment done might as well replace the 150k mile front suspension stuff. The SS sounds great and drives perfect. Once I get it broke in and tuned we will see how fast she is.