I put 315's in the rear with just a spring relocation and currently working on the rear fender roll. They fit but the roll is just for additional clearance as I drive on a road course. Hell, I was even able to put 315's in the front haha!
Here is my thread with some pics
https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2287275/2.html