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#1 |
Registered User
Join Date: Aug 2016
Location: San Antonio Texas
Posts: 10
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What proportining valve do I need for disc / drum on 69 Chevy
I have a 69 Chevy c10 that had drum / drum set up I switched it to 72 disc / drum set up but I need help picking the right proportining valve do I have to add extra break lines or can I just use the existing ones from the drum drum set up
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#2 |
Senior Member
![]() Join Date: Feb 2004
Location: Williamsburg, Ohio
Posts: 1,778
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Re: What proportining valve do I need for disc / drum on 69 Chevy
On my 67 I also went to 72 disc but I kept the original 67 front rear brake splitter and plummed in an adjustable proporting valve in the rear line that I could adjust from inside the cab. I also changed the master cylinder to an 82 vette - 72 c10 would be ok also. Speedway also says to run a residual valve on the rear brakes if drums , I did not. When I went to disc all the way around all I had to do was readjust my rear brake valve.
Be safe and test your brakes before venturing into normal traffic.
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1942 Chevy 1/2 ton Rod, 1959 GMC 1/2 ton Fleet Stepside, 1967 Chevy SWB K10, 1985 Corvette Coupe 4+3, 2015 Chevy Duramax reg cab 4WD W/T Last edited by dennislbrooks; 08-22-2016 at 10:03 PM. |
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#3 |
Registered User
Join Date: Aug 2016
Location: San Antonio Texas
Posts: 10
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Re: What proportining valve do I need for disc / drum on 69 Chevy
I bought a 73 booster master cylinder was going to just install that one and get a new proportioning valve .
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#4 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,487
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Re: What proportining valve do I need for disc / drum on 69 Chevy
I wouldn't add a valve unless the rear brakes lock up under heavy braking.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#5 | |
Registered User
Join Date: Aug 2016
Location: San Antonio Texas
Posts: 10
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Re: What proportining valve do I need for disc / drum on 69 Chevy
Quote:
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#6 |
Senior Member
![]() Join Date: Feb 2004
Location: Williamsburg, Ohio
Posts: 1,778
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Re: What proportining valve do I need for disc / drum on 69 Chevy
It is a knob style adjustable proportioning valve. Like speedway part number 910-31353.
remove rear brake line from oem splitter valve. use splice if needed to run line to the out side of the knob valve. run a new short line from in side on knob valve back to oem splitter valve. mount under dash. will show a pics. 73 master cylinder should be ok.
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1942 Chevy 1/2 ton Rod, 1959 GMC 1/2 ton Fleet Stepside, 1967 Chevy SWB K10, 1985 Corvette Coupe 4+3, 2015 Chevy Duramax reg cab 4WD W/T Last edited by dennislbrooks; 08-23-2016 at 10:57 AM. Reason: words |
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69 c10, disc conversion, proportioning valve |
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