Power brake conversion

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MikeB

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Location
North Texas -- California escapee
First Name
Mike
Truck Year
1969
Truck Model
C10
Engine Size
355
My truck is an 82 C10 with manual brakes (JB1). I would like to convert it to JB3 power brakes using a stock-type 1.25" master cylinder and booster.

If you have done this, please let me know which parts you used.
Is the pedal linkage different? How about the proportioning valve?

Would a rebuilt system like this bolt right in?

https://www.rockauto.com/info/1/501140-RIT__ra_p.jpg
 

Matt69olds

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Central Indiana
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Matt
Truck Year
81
Truck Model
GMC 1/2 ton
Engine Size
455 Olds
I have made the conversion from manual to power brakes on old GM A body cars many times, usually it involves changing he master cylinder to one with a smaller bore, and bolting on the brake booster. I’m guessing a square body would be the same.

I did eliminate the Hydro-Boost on my 81 GMC (originally diesel powered, now 455 Olds powered) years ago due to every hose leaking. I used a brake booster and master cylinder for the same year/model truck but gas powered. System bolted on easily, and has been working flawlessly probably 15 years now.
 

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