has any one used these conversion brackets??

http://cgi.ebay.com/ebaymotors/Chevy-Chevrolet-SS-Chevelle-Malibu-rear-disc-brake-/390065190021?pt=Motors_Car_Truck_Parts_Accessories&hash=item5ad1b27485#ht_1123wt_1001

I bought my brackets like the ones on e bay for my 67 wagon and bought all the hardware at auto zone. the problem is you can't adjust the callipers to the correct location . The Right Stuff has brackets with shims and you get correct callipers and brackets , Emergency brake cables And everything you need. You can buy the shortened brake lines to make the swap look factory. I have both the E bay set on my wagon and a Right Stuff set on my 67 Convertible. .Yes they have replacement parts. 1-800-405 2000

If you go that route, make sure you hook up the park brake and use it often. Those calipers are very troublesome if you don't (and occaisionally if you do). Most use the later F body stuff now, with the park brake in the rotor hat.
HTH, Jim

My 2 cents on those and brackets like them. It is a poor design, cheap to manufacture and may cause brake chatter. The problem is caliper support. When you apply the brake the rotor wants to pull the caliper with it. The bracket does not have any provision for torsional support, but relies on the slide pins to absorb the force. The pins are not designed to do that. The photo be below shows the typical GM caliper bracket for that style caliper. Notice the additional support over the center line of the rotor.

http://i80.photobucket.com/albums/j199/64elcamino/77%20Nova%20project/brakes/reardiscinstallhighlighted.jpg

I have used that style caliper and they are prone to problems, both in the initial bleeding/adjusting and keeping them in working order.

The 93 - 97 F body brakes have a better parking brake set up and the caliper is less prone to problems. The 98 - 02 F body set up is IMO the best way to go right now. I found mine on eBay complete with the cables for under $200. A little clean up, some paint and new rotors and the conversion was under $400. Installation was easy, bleeding the air out took less than 5 minutes, braking is great and the park brake actually holds the car. The brake cable is easy to shorten to the proper length and one bracket needs to be fabricated to anchor the brake cable.