Caddy calipers w/ebrake cost alot more then the kit i posted at speedway . But what about the master cylinder, proportioning valve ? master is the same but you need a disc to disc proportioning valve.

here is the speedway info

http://www.speedwaymotors.com/p/5336,11_Bolt-On-Rear-Disc-Brake-Kits.html

BOLT-ON REAR DISC BRAKE KITS
These rear disc brake kits allow you to simply bolt disc brakes on 9" Ford, 10/12 bolt GM or 7.5" GM rear ends. The kit includes two bolt-on caliper brackets, two 11-1/4" vented rotors, two new GM metric calipers drilled for 7/16"-20 inlet and hardware.

Ford and 10/12 bolt GM kit has both 5 on 4-1/2" and 5 on 4-3/4"bolt pattern. The 7.5 GM has 5 on 4-3/4" bolt pattern. Minor fitting may be required.


The rotor used in this kit has a dual bolt pattern, so it can be used on axles with either the 4-1/2” or 4-3/4” bolt pattern.



91031919 Bolt-On Rear Disc Brake Kit, 10 & 12 Bolt GM
non-emergency brake calipers
or you can buy the kit with
emergency brake calipers 


or

here is a write up i put on my site

Using Global West tubular upper control arms and taller disc brake spindles have the following advantages:

The upper ball joint is moved back to allow for higher caster alignment settings. Caster improves high speed stability and road feel. Caster also improves corner entry.

By using taller spindles and shorter upper control arms, camber curves are directly affected. The tire stays flatter on the road surface. This improves handling through the corners dramatically.
Tire life is improved because the tire remains flatter on the pavement.

The front ride height will not drop. However this combination lowers the front roll center and provides a more favorable roll axis.

Global West’s tubular upper control arms offer versatility regarding bushing selection. Stock rubber bushings, Del-a-Lum bushings (limited lifetime warranty see bushing warranty policy) or polyurethane bushings can be used.

Disc brake conversions use ready available replacement parts.
Stock spring can be used for maintaining ride comfort.
Switching to taller spindles provide bigger brakes which improves stopping ability.

The following donor cars provide 11-inch disc brake spindles:

Apollo 1975 GMC Sprint 1973-1977

Pontiac Full Size 1977-1981

Buick Full Size 1977-1981

Grand Prix 1973-1977

Pontiac Lemans 1973-1977

Buick Century 1973-1977

Monte Carlo 1973-1977

Riveria 1977-1978

Camaro 1970-1981

Nova 1974-1979

Seville 1976

Chevelle 1973-1977

Olds Cutlass 1973-1979

Skylark 1975-1979

Chevy Full Size 1977-1981

Omega 1975-1979

Ventura 1975-1977

Firebird 1970-1981

Phoenix 1977-1979

Most of the brake parts can be found at the wrecking yard. Be sure to check the spindles where the wheel bearings rest. Make sure there are no signs of galling or grooves. Check the ball joint holes for damage making sure the tapers are not out of round.

Important--- If you are going to use an 11-inch disc brake from one of the above listed cars. You will need to change the rotor wheel studs over to 12mm. All cars listed above originally came with 7/16 wheel studs.

For 12-inch disc brake spindles use:

Buick Full Size- Le Sabre Wagon / Electra Wagon 1977-1994

Cadillac Fleetwood and Deville 1977-1984 // Brougham and Fleetwood

1985-1994 Chevy Full Size 1977-1996 Caprice, Impala, Belair, Biscayne

Olds Delta 88, Delta 88 Wagon and Olds 98 / 1977-1992 Pontiac Full Size Bonneville, Catalina, Grandville 1977-1986

We have ran into two different types of 12-inch disc brake spindles. One version uses a small outer bearing measuring .750. The second type uses a larger outer bearing measuring .850. Use the large diameter outer bearing spindle.

Note:
Bring a tape measure with you to the wrecking yard because many of these vehicles also can with 11-inch brakes. Most rotors off of (B) cars have a 5 on 5 bolt pattern. You have a 4 3/4 bolt pattern, so you will not need the original rotors.

Use 12-inch rotors off of a 1988-1992 1LE Camaro/Firebird GM part # GM 18016035.
This is all you will need off of the 88-92 Camaro/Firebird. 1LE rotors have the correct bolt pattern and use 12mm studs.

The brake caliper we use are off of 1970-1976 Camaro/Firebirds.

These calipers are the right width for 1LE rotors. Use an 1-1/8 master cylinder with power brakes and a 1-inch master for manual. If you own a Turbo Coupe, you will probably have a Power Master unit. You do not have to change this unit.
We use an adjustable proportioning valve rather than a standard valve. This is our choice for increasing rear brake pressure. Your standard proportioning valve will work.

12-inch Disc brake kit with good used spindles:
Kit Contains:
2-Good used spindles
2-Inner wheel bearings/races
2-Outer wheel bearings/races
2-Inner seals
2-Brake calipers
2-(1-LE rotors)
2-Spindle nuts
2-Spindle washers
2-Hub bearing
2-Dust caps
1-Set of front pads
2-Brake hoses
2-Banjo bolts and washers
2-Backing plates
Hardware

11-inch Disc brake kit with good used spindles:
Kit Contains:
2-Good used spindles
2-Inner wheel bearings/races
2-Outer wheel bearings/races
2-Inner seals
2-Brake calipers
2-(11-inch rotors)
2-Spindle nuts
2-Spindle washers
2-Hub bearing
2-Dust caps
1-Set of front pads
2-Braided steel brake hoses
2-Banjo bolts and washers
2-Backing plates
Hardware

Using tall GM disc brake spindles with Aftermarket upper control arms will give you the following advantages:

Improved tire life through new suspension geometry.

Note:
(Spindle conversion will not change current ride height). unless using a droped aftermarket spindle

Allows much larger factory disc brakes to be used.
Spindles are stronger than original units.
Overall package provides dramatic handling gains.
Stock spring maybe used if desired.
Allows for Pro-Vintage Disc brakes to be used. (Pro-Vintage Disc brakes use Billet hubs, 4 piston
calipers and 1-1/4 wide rotors).


-- Edited by Tonys57chevy on Thursday 17th of September 2009 11:53:16 PM