72 cutlass front drum to disc conversion

meraul · September 8th, 2009, 08:44 PM

I have a 72 cutlass supreme and I am wondering if it is possible to use front disc brakes set up from a 73 or newer cutlass or any other gm car to replace the drums on my 72 ?

Eightupman · September 9th, 2009, 03:35 AM

The only 1973 or 74 car with compatible front discs that I can think of off the top of my head would be the Nova. you are limited to 68-72 A bodies (to include the grand Prix and Monte Carlo), the Nova up to 1974.....and I think there may be one or two others. if you find one of those cars, remember to take the proportioning valve and its bracket, the booster, and the front hose brackets.

Additionally, you CAN convert your exsisting drum spindles to discs by machining the third hole to mount the caliper bracket (purchased aftermarket) and then you can buy everything else including an aftermarket proportioning valve.

John

joe_padavano · September 9th, 2009, 07:14 PM

Quote:

Originally Posted by Eightupman

The only 1973 or 74 car with compatible front discs that I can think of off the top of my head would be the Nova. you are limited to 68-72 A bodies (to include the grand Prix and Monte Carlo), the Nova up to 1974.....and I think there may be one or two others. if you find one of those cars, remember to take the proportioning valve and its bracket, the booster, and the front hose brackets.

Additionally, you CAN convert your exsisting drum spindles to discs by machining the third hole to mount the caliper bracket (purchased aftermarket) and then you can buy everything else including an aftermarket proportioning valve.

John

Correct, John. 64-72 A-body, 67-69 F-body, and 68-74 X body all use the same spindles and disc brakes. The newer cars have spindles with different height, different ball joint taper, and different steering arm locations. You can swap the 77-90 B-body spindles with the appropriate ball joints, tie rod ends, and custom upper control arms, but there will still be bump steer due to the steering arm differences. By the time you do that, you could have bought the correct A-body brakes.

http://classicoldsmobile.com/forums/...sk-brakes.html

meraul · October 20th, 2009, 02:35 PM

Do you know if a 1973 olds omega will fit?

joe_padavano · October 24th, 2009, 12:05 PM

Quote:

Originally Posted by meraul

Do you know if a 1973 olds omega will fit?

The Omega is an X-body. From above:

Quote:

Originally Posted by joe_padavano

64-72 A-body, 67-69 F-body, and 68-74 X body all use the same spindles and disc brakes.

September 8th, 2009, 08:44 PM	#1 (permalink)
meraul Registered User Join Date: Jul 2009 Location: Moose Jaw SK canada Posts: 13	72 cutlass front drum to disc conversion I have a 72 cutlass supreme and I am wondering if it is possible to use front disc brakes set up from a 73 or newer cutlass or any other gm car to replace the drums on my 72 ? __________________ -72 Cutlass Supreme -02 Olds Intrigue -05 GMC SIerra 4X$ Crew Cab -85 Dodge Ram 1/2 Ton

October 20th, 2009, 02:35 PM	#4 (permalink)
meraul Registered User Join Date: Jul 2009 Location: Moose Jaw SK canada Posts: 13	Do you know if a 1973 olds omega will fit? __________________ -72 Cutlass Supreme -02 Olds Intrigue -05 GMC SIerra 4X$ Crew Cab -85 Dodge Ram 1/2 Ton

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
72 Cutlass Disc Conversion	jtsautos	Brakes/Hydraulic Systems	4	October 7th, 2009 02:28 PM
66 Toronado Front Drum to Disc Conversion	elcaminodave	Brakes/Hydraulic Systems	4	August 9th, 2009 05:57 PM
Low cost front disc brake conversion	OLD SKL 69	Brakes/Hydraulic Systems	7	March 1st, 2009 05:59 PM
question for front disc conversion?	olds1968	Brakes/Hydraulic Systems	12	February 18th, 2008 08:58 PM
Drum to Disc Conversion on 78 Cutlass	crazyiball	Cutlass	8	January 18th, 2007 07:40 PM

September 9th, 2009, 03:35 AM	#2 (permalink)
Eightupman Registered User Join Date: Nov 2006 Location: Ladson, SC Posts: 496	The only 1973 or 74 car with compatible front discs that I can think of off the top of my head would be the Nova. you are limited to 68-72 A bodies (to include the grand Prix and Monte Carlo), the Nova up to 1974.....and I think there may be one or two others. if you find one of those cars, remember to take the proportioning valve and its bracket, the booster, and the front hose brackets. Additionally, you CAN convert your exsisting drum spindles to discs by machining the third hole to mount the caliper bracket (purchased aftermarket) and then you can buy everything else including an aftermarket proportioning valve. John