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Power brake addition to '72 commando

Discussion in 'Jeepster Commando and Commando Tech' started by countryboy, Sep 22, 2008.

  1. Sep 22, 2008
    countryboy

    countryboy New Member

    Central Illinois...
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    I am getting ready to work on my commando. I have a power brake unit I got on e-bay. Still have to check to make sure it holda a vacuum. What I didn't get with it was the two spacer blocks to mount it. This is going on a '72 bull nose that never had power brakes before.

    The spacers look pretty simple. Does anybody know the dimensions on the blocks. Hole sizes and thickness?

    Thanks,

    Dave
     
  2. Sep 22, 2008
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    I think you'll have to find somebody with original power brakes, and then measure. The Commando parts are probably the same as the CJ parts from '72-75, so that's an option. If I had a parts book, I could check.

    This is a booster for a '72-73 Commando, or just some booster?

    Another possibility is to use the whole setup from a later CJ or Wrangler.
     
  3. Sep 22, 2008
    countryboy

    countryboy New Member

    Central Illinois...
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    The booster was from a '72 commando.

    Thanks for the reply. I have a parts book I can look up to see if the CJ is the same.
     
  4. Sep 22, 2008
    grouperboy

    grouperboy n00b Sponsor

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    Somebody selling disc brake setup off a 72 on ebay. See ebay thread:)
     
  5. Sep 22, 2008
    Pack Rat

    Pack Rat Old Timer

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    I have a set out in the shop I can take some measurements off. Might be Tuesday afternoon before I can get to it.
     
  6. Sep 23, 2008
    countryboy

    countryboy New Member

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    Thanks I really appreciate that.

    Dave
     
  7. Sep 23, 2008
    Pack Rat

    Pack Rat Old Timer

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    I PM'd you regarding those spacers.
     
  8. Sep 24, 2008
    xxwolfyxx

    xxwolfyxx I broked it

    Boston, Mass
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    I need the same thing on my 73.
    I figured I could just make them to what ever size worked best for clearance.
    Just need to fab a push rod of the correct length
     
  9. Sep 25, 2008
    Hurstjeepster

    Hurstjeepster New Member

    Helena, Montana
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    Wagoneer boosters/master cylinders from the same year model ('72-'73) will also work in Commandos as I used a rebuilt one in my '73 Commando with a 304/auto. The Wagoneer boosters are larger diameter so there is a less clearance for the engine dipstick, but there is no problem with hood clearance on a Commando. I doubt these will work if you have the 258 I-6 motor or if Powerbrakes were even offered on those. The spacer blocks in the Wagoneers may also be the same, but I a, not sure. I have an original '73 Commando booster laying around if someone wants it for a rebuild core. It is free if you pay shipping--I hate to throw it away as I bet they are getting rare these days. bg
     
  10. Sep 25, 2008
    countryboy

    countryboy New Member

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    As best as I can tell power brake were not offered in '72 and '73 with the I-6 engines. The problem is interference with the air cleaner I think. I am putting mine in a Commando with an I-6 so I'll let you know.

    Dave
     
  11. Sep 25, 2008
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    I've heard that before, and I'm skeptical. My '75 CJ6 with a 258 had factory power brakes. I don't think the distance of the booster from the engine is different on the Commando... CJ fenders and hood fit on a Commando, so the cowl has to be basically the same.

    Pretty sure the diameter of the CJ booster is smaller than the Wagoneer/J-truck booster. I can measure the J-truck booster if needed.
     
  12. Sep 25, 2008
    Pack Rat

    Pack Rat Old Timer

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    Countryboy is correct, PB were never offered as an option with the straight six for that very reason.
     

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