69 C 10 brake upgrade

[355]

My friend upgraded my truck to the 72 disk system. I believe that I have to change out my old master cylinder, and the 72 was already robbed. I searched and didn't find my answer but over the last 6 years here I know that I have read many inputs, so guys help me if you can. What is a good junk yard swap, I already had a booster system, Thanks for your time and trouble, Steve  

[OldSub]

What is a good junk yard swap

Best bet would be a '72 Chevy pickup...

I have a '72 Chevy C10 with disk brakes and it has a porportioning valve close to the master.  If the bore sizes on your master are the same as for the '72 that porportioning valve may be the key piece you are missing.

If it were me I'd buy a new one.

[enjenjo]

A 73 to 79 Pickup master will work too, and are much easier to find.

[355]

Thanks guys, y'all have never let me down.