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Old 02-12-2007, 04:36 PM   #1
bigo181979
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What proportioning valve do I use????

Well I am doing the 88 6lug brake conversion withe the c20 control arm and so on.
I got a new master cylinder for a 71-72 with disks but my auto parts dosen't show a listing for the propotioning valve. Does any one have a part number or have any info that could help.

Last edited by bigo181979; 02-12-2007 at 04:36 PM.
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Old 02-12-2007, 04:46 PM   #2
Longhorn Man
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Re: What proportioning valve do I use????

I would run the factory drum/drum block to maintian the dash warning light, and then an adjustable prop valve (aftermarket) for the reat. This way you can fine tune it instead of guessing, or going off of some one elses's *good enough* homework. Simply installing taller tires in the rear can throw the proportioning way off.
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Old 02-12-2007, 04:54 PM   #3
Palf70Step
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Re: What proportioning valve do I use????

Here is one source

http://www.inlinetube.com/Prop%20Valves/VCT103.htm

Other than that quickly, the only place (new-stock) I have ever found a proportioning valve was the dealer.

Using an aftermarket adjustable is probably the best bet as Andy mentioned.
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Old 02-12-2007, 11:20 PM   #4
bigo181979
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Re: What proportioning valve do I use????

anyone else????
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Old 02-13-2007, 02:37 AM   #5
pebbleboy
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Re: What proportioning valve do I use????

gmcpauls.com


http://www.gmcpauls.com/Brakes&Steering.htm

Brake Proportioning Valve W/Bracket & Lines Each
1286368 New replacement brake proportioning valve with correct mounting bracket to mount the valve to master cylinder, proportioning valve to master cylinder pre-bent brake lines. All needed installation hardware is included. Specify in cart style needed. Disc/Drum, or 4 wheel disc brakes. $89.95

Did you lok at this one?
I used the disk/drum one when I did my drop/front disk conversion.
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Old 02-13-2007, 10:18 AM   #6
bigo181979
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Re: What proportioning valve do I use????

Quote:
Originally Posted by pebbleboy View Post
gmcpauls.com


http://www.gmcpauls.com/Brakes&Steering.htm

Brake Proportioning Valve W/Bracket & Lines Each
1286368 New replacement brake proportioning valve with correct mounting bracket to mount the valve to master cylinder, proportioning valve to master cylinder pre-bent brake lines. All needed installation hardware is included. Specify in cart style needed. Disc/Drum, or 4 wheel disc brakes. $89.95

Did you lok at this one?
I used the disk/drum one when I did my drop/front disk conversion.

Thanks thats what I was looking for.
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Old 02-13-2007, 08:44 PM   #7
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Re: What proportioning valve do I use????

Glad i could help.
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