68gts383: I am going thru this also. I have a recent purchase a 65 Dart roller w the springs/perches relocated way to the inside of the frame rails. Do I need to throw a wheel/tire on there & see how much sidewall clearance I have to the half moon circular wheel wells on each side? This is my 1st time w this & it seems like I would run out of available space on the wheel wells(on the inside part at least) way before I would come close to hitting these (relocated) springs.