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problem upgrading from drum to disc

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by 70jimmy, Sep 13, 2005.

  1. 70jimmy

    70jimmy 3/4 ton status Premium Member GMOTM Winner

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    Released from Pueblo, told I belong in Southpark
    I recently got a master cylinder and booster for a 1972 1 ton 4 wheel drive which they say is the same for 3/4 by the part number. My new axles are 4 wheel disc. Anyway I put everything on and noticed that the rod going into the back of the booster was tight agaisnt the firewall. I put pressure on it to get it to mount. When I pushed on the brake pedal it wouldn't move.

    I measured the bracket and it was like 3 and 1/2 inches from firewall to back of booster. So I went to a friends first gen stash and checked his trucks. I found all but one of his had brackets that were more like 5 and 1/2 inches from firewall to back of booster. I put the different bracket on and voila'.

    I also found the truck I took the bracket off had a support rod that went from the upper driver's side bolt on the back of the booster at an angle toward the driver's side firewall and mounted on a stud there. So I stole :o (I mean aquired that also).

    Just more screwed up stuff I ran across in my restomod saga!! :rolleyes:
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    Yup,
    My 72 received an upgrade from 1/2ton to 1ton master/booster.
    the push rod was way shorter on the 1ton stuff. Now RyanB swaped just his booster and didn't need a shorter pushrod?? Duno why?
    Oh and I too have the extra support rod :D
     
  3. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    thats odd..

    I upgraded and there was no factory mount or location for a support rod...

    what am I doing wrong????

    [​IMG]

    :thinking: ......
     
  4. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Well for starters.....your passenger door opens over your tranny.
     
  5. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    I always thought that didn't look right :thinking:

    back to the drawing board I guess :o
     

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