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    Results 1 to 5 of 5
    1. #1
      Join Date
      Feb 2012
      Location
      Ottawa, Ontario
      Posts
      45
      Country Flag: Canada

      68 Mustang brake booster - help with replacement part

      Back in the fall I had the car ('68 Mustang, 390) at the local performance shop, doing the alignment after I'd installed coilovers etc. While there, they noticed the brake booster had a vacuum leak, and ordered in a replacement. By the time it came in, I had the car home for the winter, so just paid for the booster and brought it home. This weekend I've pulled out the old one and started to install the new, but they are not exactly the same. The new part is from Leed Brakes, and is to fit 67 to 69 models.
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      As you can see, the pushrod sticks further out of the old one, and a major difference is that the old unit has a rubber seal that a spacer sat over. The spacer is rebated for the seal. The spacer also serves as a vent to allow airflow into the unit. The new unit did not include a spacer.
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      Trying to slide the master cylinder over the studs, the spacing is off just a hair. The holes could be opened with a die grinder to make it fit. I noticed that the holes on the old spacer were already oval, and would slide over the studs on the new booster.

      So - will this unit work? With the spacer or without? Any guidance from someone who's dealt with this would be really appreciated.

      Thanks
      Phil.

    2. #2
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,971
      Country Flag: United States
      Phil,

      I guess I want to know what the pedal pushrod is doing with the new and old booster.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    3. #3
      Join Date
      Feb 2012
      Location
      Ottawa, Ontario
      Posts
      45
      Country Flag: Canada
      Quote Originally Posted by andrewb70 View Post
      Phil,

      I guess I want to know what the pedal pushrod is doing with the new and old booster.

      Andrew
      Pretty similar, both are the teardrop style. Hard to judge if they are exactly the same length once bolted to the firewall, but the new one is adjustable.
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      Just found a photo on the Leeds Brakes site that would indicate that, with their master cylinder, no spacer is used.
      Last edited by andrewb70; 05-23-2020 at 04:30 PM.

    4. #4
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,971
      Country Flag: United States
      Phil,

      That picture link didn't work as intended....LOL

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    5. #5
      Join Date
      Feb 2012
      Location
      Ottawa, Ontario
      Posts
      45
      Country Flag: Canada
      Quote Originally Posted by andrewb70 View Post
      Phil,



      That picture link didn't work as intended....LOL

      Andrew
      yeah, thanks for cleaning it up. This should work:
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