Found the cause of the brake shudder on the 85' Will post some pics when the batteries are charged for the camera. Unbelievable rear rotor wear on the inside of the rotor....could'nt see it until the rotors were removed. The face outward looks normal and I could turn the rear wheels easily by hand. I have actual metal peeling off the inside of the rotors. Definately not a smooth surface. I am Very happy to have taken them off now. Thanks VS tech for the suggestion. I figured the fronts were fine since there was no pulsing in the steering wheel. So I checked the rears with my finger behind the rotor.