Question about 67' dual master swamp - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Isaiah92260 · 03-15-2016, 12:32 AM

I've read the sticky about the swamp and some other threads.... But do have a question. I got a 67' dual master, gonna install into my 63.... It's pretty clear that my brake pushrod is going to work and won't have to worry about that, now after sourcing all the right Brass Adapters for the piping, but once that is all put together... I'm confused on which 2 of the ports are for which Brake lines.. The back port closest to the firewall is a 5/8s port... And the front is 9/16th.... I can see by eyeball on the pictures from other threads my ports are reversed, looks like the other MC they have got a 5/8s port on the front.... Maybe I am over thinking but I am going to attempt to do the swamp after work and be able to drive my truck the next day, so I want to be sure on the procedure... If anyone can help me I would greatly appreciate... Thanks a ton for reading!

Keith Seymore · 03-15-2016, 06:33 AM

Are you disc/drum or drum/drum?

For disc/drum, the larger port and reservoir go to the front brakes.

K

patrickk1 · 03-15-2016, 07:52 AM

what's a dual master swamp?

**chevy2tom** · 03-15-2016, 08:01 AM

Quote:

Originally Posted by patrickk1

what's a dual master swamp?

Separate reservoirs for front & rear brakes. Typical master cylinder. If you're drum drum try one from a impala or chevelle from the 60's

Isaiah92260 · 03-15-2016, 08:55 AM

Quote:

Originally Posted by Keith Seymore

Are you disc/drum or drum/drum?

For disc/drum, the larger port and reservoir go to the front brakes.

K

It is a Drum/Drum.

Rust-O-Matic · 03-15-2016, 11:18 AM

Like Keith said, the larger port and/or reservoir go to the front brakes.

I used a '68 drum-drum cylinder on my '66. One port was 1/2", one was 9/16". I plumbed the larger port to the front brakes, and it works like a champ.

No need to fool around with cylinders from other applications, or make this any more difficult than necessary.

03-15-2016, 12:32 AM	#1
Isaiah92260 Registered User Join Date: Jul 2015 Location: Whittier, CA Posts: 851	Question about 67' dual master swamp I've read the sticky about the swamp and some other threads.... But do have a question. I got a 67' dual master, gonna install into my 63.... It's pretty clear that my brake pushrod is going to work and won't have to worry about that, now after sourcing all the right Brass Adapters for the piping, but once that is all put together... I'm confused on which 2 of the ports are for which Brake lines.. The back port closest to the firewall is a 5/8s port... And the front is 9/16th.... I can see by eyeball on the pictures from other threads my ports are reversed, looks like the other MC they have got a 5/8s port on the front.... Maybe I am over thinking but I am going to attempt to do the swamp after work and be able to drive my truck the next day, so I want to be sure on the procedure... If anyone can help me I would greatly appreciate... Thanks a ton for reading!

03-15-2016, 06:33 AM	#2
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: Question about 67' dual master swamp Are you disc/drum or drum/drum? For disc/drum, the larger port and reservoir go to the front brakes. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

03-15-2016, 07:52 AM	#3
patrickk1 Registered User Join Date: Apr 2009 Location: Billerica, Ma Posts: 197	Re: Question about 67' dual master swamp what's a dual master swamp? __________________ - Patrick 1964 GMC pickup lwb ~ My newest build! 1937 Ford Coupe ~ Custom frame, LS1, quickchange 1950 Chevrolet 3100 ~ Bagged (Sold) 1931 Chrysler Roadster ~'32 Ford Frame, Channeled 8" (Originally a 60's show car) 1967 Chevelle ~ 454 Triple Black (Sold) 1964 Chevrolet Impala SS (Sold)

03-15-2016, 11:18 AM	#6
Rust-O-Matic Registered User Join Date: Apr 2015 Location: Gallatin, MO Posts: 295	Re: Question about 67' dual master swamp Like Keith said, the larger port and/or reservoir go to the front brakes. I used a '68 drum-drum cylinder on my '66. One port was 1/2", one was 9/16". I plumbed the larger port to the front brakes, and it works like a champ. No need to fool around with cylinders from other applications, or make this any more difficult than necessary.

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