I just installed my new wheels and tires(weld 15x8 3.5BS 275/60 M/T drag radials) on rear, took it for a ride and they are rubbing on the opening of the quarter. Will air bags fix this? Seems to be a common wheel/tire setup.Also my brakes are pulsing and going almost to the floor. I installed the big wheel cylinders and bleed them several times but no change. I don't see any fluid leaks, could my PM be on its way out?