Mike, Although the Lockheed axles have had a reputation for bearing failure, I have to believe those cars that did were really pushed to their limits constantly. You should try to get your hands on a shop manual. At the very least you'll have to rent a good size bearing puller. At least these axles come apart relatively easy compared to the later tapered hubs. Anyway check the bearings and good quality replacements are not cheap. The does seem to be some confusion in the current parts books, but maybe they all carry the later part, which is what fits yours in any case. As soon as you can read the number on the bearing, try calling some bearing suppliers in your area. Maybe someone in your club has a parts washer or take it to a garage to get all the crud off the bearing. See if you can feel any spalling on the top of the race where all the pressure is and rotate slowly, enough times so that all the ball bearings make contact with that area. If it feels okay, then just relube and reassemble, but if it were mine I would rotate the race 180 degrees so you will be dealing with a less stressed part of the race. Punch mark or paint your top bolt for reference before removal. Have fun.