Yeah, I'll second the drag link socket, a real lifesaver when you need them.
sears has them, but they are normally not stocked, need to be ordered.
my local napa didn't know what I was talking about, but the napa distribution center had them in stock.
Some shops that carry SK tools have them too.
look in places that cater to old car and truck freaks, most of the old trucks/cars used drag links instead of ball joints, smilar to those shown on this page:
http://www.akalbull.com/drag_link_repair_kits.htm before I found a place to get the drag link sockets, what I used was a short length of angle iron with one leg filed back to provide a driver surface, so it was similar to using an allen wrench.
ken.