I rebuilt calipers for my '80 coupe - it came with Bendix calipers but I have only found kits for ATE so I got some decent looking ATE's at the junkyard and then bought rebuild kits from this site. Did not split the calipeers open but used plenty of brake cleaner and compressed air to clean them up and used a little dab of Dow-Corning high vacuum grease to coat the pistons and seals. Replaced the flexible brake lines, too. This fix was a bit time consuming but seems to have worked out well. Most difficult part was bleeding - that became very frustrating. I finallt rigged up a way to bleed the MC by cutting off short some of the hard lines that exit the MC (spare, from junkyard) and had them dumping right back into the resevoir.