What's up with these different brake proportioning valves? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72farmer · 11-29-2015, 10:16 AM

I am in the middle of converting my 67 front drums to discs.I also have a 72 c-10 that I am working on and it is almost finished.I have a 72 GMC parts truck that I have been robbing steering and brake parts off of.
I have a new master cylinder from Advance that I am going to mount on my old booster on my 67.I robbed the pro. valve off of the GMC parts truck to use on 67 and compared it to my almost finished 72 Chevy.The two 72's are completely different.The 72 GMC valve is laying on top of the 72 Chevy master cylinder in pics.What is the differences in the 2 valves?

11-29-2015, 10:16 AM	#1
72farmer Registered User Join Date: May 2009 Location: Hazel Green AL Posts: 286	What's up with these different brake proportioning valves? I am in the middle of converting my 67 front drums to discs.I also have a 72 c-10 that I am working on and it is almost finished.I have a 72 GMC parts truck that I have been robbing steering and brake parts off of. I have a new master cylinder from Advance that I am going to mount on my old booster on my 67.I robbed the pro. valve off of the GMC parts truck to use on 67 and compared it to my almost finished 72 Chevy.The two 72's are completely different.The 72 GMC valve is laying on top of the 72 Chevy master cylinder in pics.What is the differences in the 2 valves? Attached Images

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