Master Cylinder Help

[BanjoDude]

Hi guys,

I have my grandpa's old '69 C-20. The guy I bought it from had done a nice restoration, but apparently didn't touch the engine bay. I've been cleaning up the wiring (from an old security system he had installed at one point, etc.) and am going to slowly clean up the engine bay. The master cylinder and proportioning valve are in pretty rough shape. I'd love some advice.

The master is marked with 29910 (if I'm reading correctly).

The proportioning valve is marked with "M-R" on the top and "9-6" on the side.

The truck is still the original drum/drum braking configuration.

Should I replace the master cylinder and valve? If so, what would you recommend? I'd rather cry once / buy once and get good stuff.

Am I better to send them off for a rebuild? If so, where?

Anything else I should do while I'm at it? The booster is in good cosmetic shape, and brake power is very good, though the rears lock too easily in my opinion.

Thanks in advance for your help!

Wes

[LockDoc]

-
If everything is working and the master cylinder is clean on the inside I would just leave it be. You can clean the master cylinder and valve up with a small wire brush and put a couple of coats of paint on them with a small paint brush.
.