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Click on image for the lowdown. 
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| | Forums66 Topics128,052 Posts1,055,725 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | Some master cylinders have the residual pressure valves installed and the proportioning is designed in for the application. A stand-alone proportioning valve would need to be different for disc or drum brakes if the residual valve was integral. | | |
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