71'-72' Master on 67'-68' booster ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hotrod 80 · 12-17-2009, 11:16 AM

Will a 71'/72' disc brake master cylinder and proportioning valve mount and work properly in place of a 67' drum brake master and distribution block ? I have the disc master and the drum brake booster is on the truck . I am wanting to keep the factory booster .

71meangreenc10 · 12-17-2009, 02:36 PM

Are you changing the front to Disk? If so, it should work just fine. Some one chime in if I am in left field...The only difference I know is that the brake lines run different on the frame rails between those years and may need massaging to get to the Dis Block.

If your not running disks dont change it.

Smitty

Smitty

hotrod 80 · 12-18-2009, 08:43 PM

Quote:

Originally Posted by 71meangreenc10

Are you changing the front to Disk? If so, it should work just fine. Some one chime in if I am in left field...The only difference I know is that the brake lines run different on the frame rails between those years and may need massaging to get to the Dis Block.

If your not running disks dont change it.

Smitty

Smitty

I am putting a 67' cab on a 72' swb 5 lug disc brake chassis and want to run the 72' master cylinder and prop valve on the 67' brake booster .

71meangreenc10 · 12-18-2009, 09:20 PM

The catalog shows two different part numbers for the boosters, maybe because of size, but there is a difference for some reason, I am not an engineer so I would say after finding out about the different sizes of boosters to call MP Brakes or a company that specializes in brakes to see if its safe. Thats the key,make sure its safe.

The way I read your post was that you were changing the whole system not splitting it(my fault). Why not just put a complete 72 setup on the 67?

Smitty

unclewatts · 12-19-2009, 12:56 AM

If I was you I would forget that 67 booster and install a new or rebuilt 72 booster. Don't take a chance on safety with some old raggedy 67 booster. JMHO.

hotrod 80 · 12-19-2009, 04:07 AM

Well the master cylinder will be new , but either booster will be used . It is my understanding that even if the booster fails i will still have manual brakes .

**STP67-72** · 12-20-2009, 12:05 AM

Hey Hotrod 80
The master cylinder and p- valve will work fine on the booster. Two different companies made the boosters. Bendix and Moraine ?? I think. I have used them on both through the years.

trenz68 · 12-20-2009, 02:27 PM

Same setup i did..cool

12-17-2009, 11:16 AM	#1
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	71'-72' Master on 67'-68' booster ? Will a 71'/72' disc brake master cylinder and proportioning valve mount and work properly in place of a 67' drum brake master and distribution block ? I have the disc master and the drum brake booster is on the truck . I am wanting to keep the factory booster . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

12-17-2009, 02:36 PM	#2
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,179	Re: 71'-72' Master on 67'-68' booster ? Are you changing the front to Disk? If so, it should work just fine. Some one chime in if I am in left field...The only difference I know is that the brake lines run different on the frame rails between those years and may need massaging to get to the Dis Block. If your not running disks dont change it. Smitty Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van"

12-18-2009, 09:20 PM	#4
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,179	Re: 71'-72' Master on 67'-68' booster ? The catalog shows two different part numbers for the boosters, maybe because of size, but there is a difference for some reason, I am not an engineer so I would say after finding out about the different sizes of boosters to call MP Brakes or a company that specializes in brakes to see if its safe. Thats the key,make sure its safe. The way I read your post was that you were changing the whole system not splitting it(my fault). Why not just put a complete 72 setup on the 67? Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van" Last edited by 71meangreenc10; 12-18-2009 at 09:22 PM.

12-19-2009, 12:56 AM	#5
unclewatts 70 Chevrolet=Obsession Join Date: Jun 2009 Location: nice ca Posts: 1,067	Re: 71'-72' Master on 67'-68' booster ? If I was you I would forget that 67 booster and install a new or rebuilt 72 booster. Don't take a chance on safety with some old raggedy 67 booster. JMHO. __________________ I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner)

12-19-2009, 04:07 AM	#6
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: 71'-72' Master on 67'-68' booster ? Well the master cylinder will be new , but either booster will be used . It is my understanding that even if the booster fails i will still have manual brakes . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

12-20-2009, 12:05 AM	#7
STP67-72 Senior Member Join Date: Jan 2002 Location: PORT NECHES, TEXAS / USA Posts: 1,667	Re: 71'-72' Master on 67'-68' booster ? Hey Hotrod 80 The master cylinder and p- valve will work fine on the booster. Two different companies made the boosters. Bendix and Moraine ?? I think. I have used them on both through the years. __________________ 55 Chevy original swb (big back window) 61 Chevy bubble top (427-5 speed) 67 Chevy stepside (Krusty) 68 Chevy swb fleet (Lola) 68 Chevy swb fleet 71 Chevy swb fleet ( future PB project) 97 crew cab power stroke 07 SS Trail blazer

12-20-2009, 02:27 PM	#8
trenz68 Damage Inc Join Date: Dec 2008 Location: Baytown Tx Posts: 336	Re: 71'-72' Master on 67'-68' booster ? Same setup i did..cool __________________ 05 CC- magnacharged,LTs,Gt-2 cam,3.73s,tru-trac,tuned-sold 01 ECSB- caddy-clipped,22/24 intros,cammed,layin-frame 04 RCSB-joe gibbs clone,22in billets 68 stepper build http://67-72chevytrucks.com/vboard/s...d.php?t=332337



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