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Re: Correct Master Cylinder
Quote:
Originally Posted by samkost
Just trying to replace my current 50 year+ set up which worked flawlessly before the restoration shop mishaps.
I also want to maintain the current original cast iron proportioning valve.
Having several forum members here post responses to my questions,
I have been told that this AC Delco/GM part # 18M1036 master cylinder is the correct replacement for my 72’ C10 with SPID code J70 Hydro Brake Booster, with original front disc/rear drum.
Unfortunately the O.E. replacement parts are not readily available anymore and AC Delco has replaced the older 2 bail design with the single style bail.
I may go with a Corvette or Camaro style master (deep bore) brake cylinder.
My booster came from P.O.L. I will try them for a compatible master cylinder.
Still waiting for the local GM dealership to locate an older master replacement.
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If the master cylinder worked before I would disassemble it and inspect the bore. If it isn't pitted or scored then get a rebuild kit and install it. There are numerous videos on how to do rebuild a master cylinder. It's a pretty easy job.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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