Havent had an e body for quite a while but had a 73 cuda at 1 point and I know I ran 10" on it with bias ply's. They stuck out under the lip but not past it. Im sure air shocks were in play but i'd like to run more than a 275/15 back there with coil overs and definently dont want no quarter damage. Anybody else try this? Im gonna measure my backspace and fit the fattest tread i can fit on the challenger. Ive read a lot of posts and im not moving the springs cuz of #s car but any new posts of max wheels would be helpful. Thanks to all!