Hy Skooter, If I am remembering correctly 52s have Bendix brakes, correct? If that is the case are both front brakes assembled the same way, primary (shorter) shoe to the forward side? Are both the rear brakes the same temperature after some braking? We had a vehicle at work that pulled to the right, we tried to figure out why but couldn't find anything obvious, so we stripped the whole front end down and we found the right side backing plate to spindle bolts were a bit loose, tightening everything up and reassembly of the original components revealed no more pulling, hope that helps.
