I have 265 x 50 x 15 s on the front. My rims are 8.5 inch centerline drag lights. No modification to the front. MY tires do not stick out. I had to trim the inner lip on the fenderwheel down to about 1/2 it's original thickness but the tire fits inside the fenderwheel. The frame in a few places lightly touches but the frame is polished in these areas and no damage to the side walls. The spring also need to be shortened. It was alot of fiddling but worth it. The rim I had in the last post is one I machined myself for the mustang whick will have 315 x 17 inch on the back under the fender well. Since it is metal I will tub it slightly in spots if necessary.
This is the vet 2 years ago when I run nitrous. It is now blown.