I have 315/35-17's on the back of my 72 Cuda and 275/40-17's on front. The wheels are TT2's and are actualy Mustang fitment. How can I get that size wheel and tire under my 70 Mach1? To pull off the clearance on the rear of the Cuda, I had to install a rear spring relocation kit that moved the leaf springs in 1.5 inches.