Are you running your rear suspension in the stock location? I moved my springs in 3/4 of an inch in the rear and I'm having a Hell of a time fitting Torque Thrust 15x8 with 4.5 back spacing and 275/60 15 M-H Drag Radial's on the back of my 72 Swinger. I'm going to have to trim my inner quarters and it's still going to be awful tight.