Dave,as stated above,the spindles are junk,and the rotors too!,the calipers will need servicing,the only way to do that is find some cheap NOS parts,or send them in to a shop with access to the parts for rebuilding,,they are worth about $20 each as cores,,from this guy! that's why they are still on the car,and the rest of the frt. clip is gone,if they were late style BB pattern,they would be long gone,,I know where there is a set nearby,,but I never checked to see if they were 4 piston or not as the car isn't going anyplace,it is a '73 swinger,I just noticed one day,in my rush to get to the B body's,surrounding it, that the calipers were hanging still and the rotors were gone,and made a mental note, to go back and get the spindles when I had more time,,