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**chewychevy67** · 03-12-2017, 08:45 PM

Yes I get that. I guess what I wanted to know is if I have a stock power drum drum 67 gmc and I add the 6 lug mcgaughys disc kit can I add the hold off valve that sits mounted to the master cylinder used on 67 to 70 cars with factory disc brakes to my already existing master cylinder and metering valve and have the brakes work properly. I could go get the 71 and up lines and prop valve but all of my brake lines are in and new. If I have to mess with them I will just keep the stock power drums.

03-12-2017, 08:45 PM	#6
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,592	Re: Disc brake conversion question Yes I get that. I guess what I wanted to know is if I have a stock power drum drum 67 gmc and I add the 6 lug mcgaughys disc kit can I add the hold off valve that sits mounted to the master cylinder used on 67 to 70 cars with factory disc brakes to my already existing master cylinder and metering valve and have the brakes work properly. I could go get the 71 and up lines and prop valve but all of my brake lines are in and new. If I have to mess with them I will just keep the stock power drums. Last edited by chewychevy67; 03-12-2017 at 09:14 PM.