IVE GOT A 70 SWINGER.I WANT TO MINI TUB THE CAR AND MOVE THE SPRINGS IN 3 INCHES.WHATS THE BIGGEST TIRE I CAN FIT UNDER THERE.IM GOING TO REMOVE THE FACTORY WHEEL TUBS AND INSTALL AFTERMARKET TUBS.IM RUNNING A 600 HP 451 STROKER.ANY INFO WILL BE HELPFULL.