There are kits available to replace the balls on the drag link with the same ball type as original, not like the modern type in the video that Chuck linked. Some guys have replaced the drag link completely with a modern adjustable type, but I believe that requires reaming the holes in the arms with a taper reamer. I replaced the balls on my pitman arm and steering arm and used the socket rebuild kit on the original drag link, but used the modern style ends on the tie-rod.
