Anybody running manual disc brakes? Pics - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72SB · 06-04-2023, 03:58 PM

my 72 was manual disc/drum but I converted to power.

Here is a pic as it was with stock manual MC

**jocko** · 06-04-2023, 04:03 PM

Gregski, LMC used to carry manual vs power 71-72 master cylinders - here's a part # ref for you - https://67-72chevytrucks.com/vboard/...81&postcount=7

54blackhornet · 06-04-2023, 04:31 PM

Love your L6 with power steering !

72SB · 06-04-2023, 04:47 PM

Quote:

Originally Posted by 54blackhornet

Love your L6 with power steering !

If its mine your talking about, yeah it is factory PS. I pulled the huge stock steering wheel and put in a smaller one as at 6'2" My leg was sideways to hit the brakes. Easy turning with the power with smaller wheel

Now power disc/drum brakes to....

**HO455** · 06-04-2023, 07:38 PM

I don't know for sure about the master cylinders for manual disc brakes in our trucks, but I do know that in Pontiacs that the manual disc master cylinders were a one year only option and they had a different bore diameter than the power brake master cylinders did.

Last time searched for one I had to have the counterman look the number up in a BOOK!

There was no listing in the computer for a manual master cylinder.

I would bet the bore diameters are different for our trucks also.

**Gregski** · 06-04-2023, 07:45 PM

Quote:

Originally Posted by HO455

I don't know for sure about the master cylinders for manual disc brakes in our trucks, but I do know that in Pontiacs that the manual disc master cylinders were a one year only option and they had a different bore diameter than the power brake master cylinders did.

Last time searched for one I had to have the counterman look the number up in a BOOK!

There was no listing in the computer for a manual master cylinder.

I would bet the bore diameters are different for our trucks also.

thanks, that sounds boring [sorry couldn't help it]

72c20customcamper · 06-04-2023, 07:58 PM

I used this master on my Studebaker to go from manual drum to manual disc .

https://www.speedwaymotors.com/GM-Co...ore,51673.html

Some pictures I used an inline portioning valve for the rear .

06-04-2023, 03:58 PM	#1
72SB Registered User Join Date: Apr 2022 Location: Moorpark, CA Posts: 775	Re: Anybody running manual disc brakes? Pics my 72 was manual disc/drum but I converted to power. Here is a pic as it was with stock manual MC Attached Images

06-04-2023, 04:03 PM	#2
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,998	Re: Anybody running manual disc brakes? Pics Gregski, LMC used to carry manual vs power 71-72 master cylinders - here's a part # ref for you - https://67-72chevytrucks.com/vboard/...81&postcount=7

06-04-2023, 04:31 PM	#3
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,423	Re: Anybody running manual disc brakes? Pics Love your L6 with power steering ! __________________ 71 C-20 07 Magnum RT AWD

06-04-2023, 07:38 PM	#5
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,628	Re: Anybody running manual disc brakes? Pics I don't know for sure about the master cylinders for manual disc brakes in our trucks, but I do know that in Pontiacs that the manual disc master cylinders were a one year only option and they had a different bore diameter than the power brake master cylinders did. Last time searched for one I had to have the counterman look the number up in a BOOK! There was no listing in the computer for a manual master cylinder. I would bet the bore diameters are different for our trucks also. __________________ 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

06-04-2023, 07:58 PM	#7
72c20customcamper Registered User Join Date: Jul 2018 Location: Catskill Mountains,NY Posts: 8,947	Re: Anybody running manual disc brakes? Pics I used this master on my Studebaker to go from manual drum to manual disc . https://www.speedwaymotors.com/GM-Co...ore,51673.html Some pictures I used an inline portioning valve for the rear . Attached Images __________________ Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. Last edited by 72c20customcamper; 06-04-2023 at 08:44 PM.



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