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Air Conditioner Compressor Upper Bracket question

Discussion in 'Chassis restoration' started by rkammer, Mar 13, 2024.

  1. rkammer

    rkammer Gold Level Contributor

    I've seen various compressor top brackets on 455 engines with a hole drilled in the top of the bracket and a ground wire bolted to the hole. Is this factory and, if so, where should the hole be? Here's my 1970 bracket without the hole and the ground wire is secured with a nut and bolt to the corner of the compressor. How was this handled in the '68-73 GSs?
    Comoressir Bracket.jpg
     
  2. hugger

    hugger Well-Known Member

    Factory yes and for 72+
     
  3. Redmanf1

    Redmanf1 Gold Level Contributor

    This is a correct 70 GS455 with AC.

    I thought you needed a shorter belt until I saw the pulley size.

    .
    Clipboard01.jpg
     
    Last edited: Mar 17, 2024
  4. rkammer

    rkammer Gold Level Contributor

    I'd like to see a photo of a '72 and up bracket so I can see where the hole is for the ground strap.
     
  5. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I believe 71 also had the top ground bolt hole….at least big cars did. Can’t imagine why A bodies wouldn’t have.
     
  6. Redmanf1

    Redmanf1 Gold Level Contributor

    72

    .
    ac1.jpg
     
    rkammer likes this.
  7. Buicksky

    Buicksky Platinum Level Contributor

    I think it was a big car option as well I know the 3 68 to 70 GS ones, I had did not have a hole.
     
  8. rkammer

    rkammer Gold Level Contributor

  9. copperheadgs1

    copperheadgs1 copperheadgs1

    71-72 used same bracket with small hole and screw for ground. 70 bracket was a totally different bracket with no small hole and bracket was a totally different angle.
     
  10. copperheadgs1

    copperheadgs1 copperheadgs1

    Big car 455 and GS 455 used the same brackets
     

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