67 300 w/A.I.R. intake manifold bolt locations - NCRS Discussion Boards

67 300 w/A.I.R. intake manifold bolt locations

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  • Mike E.
    Extremely Frequent Poster
    • February 28, 1975
    • 5138

    67 300 w/A.I.R. intake manifold bolt locations

    It's an original motor car, with intake removed in 1981. Plastic bag is labeled "intake manifold bolts." At least 1 is not original. My understanding (correct me if I'm wrong) is that one of the right-hand ones (3rd back?) has a threaded stud for mounting of the strap-type bracket for the diverter valve. Are there any others that should be studs like that, or are all the rest regular old intake manifold bolts?
    Thanks!!!
    Mike Ernst
  • Rob Dame

    #2
    Re: 67 300 w/A.I.R. intake manifold bolt locations

    Mike, A couple of years ago now I helped assemble a 66 350 HP with AIR. I think there was only one stud in the location you mentioned but there was also a clip that holds the chrome vacuum advance tube as well. I can't remember just how that clip attached. Rob

    Comment

    • Joe L.
      Beyond Control Poster
      • February 1, 1988
      • 43221

      #3
      Re: 67 300 w/A.I.R. intake manifold bolt locations

      Mike------

      Yes, the third intake manifold bolt position on the right side is occupied by a special stud. I believe that this stud was GM #3883980 but it's long-since discontinued. Also, the forward right side manifold bolt is longer than the others to accomodate the thickness of the AIR pump bracket which it also retains.
      In Appreciation of John Hinckley

      Comment

      • Mike E.
        Extremely Frequent Poster
        • February 28, 1975
        • 5138

        #4
        Re: 67 300 w/A.I.R. intake manifold bolt locations

        Thanks for your responses--any idea what the head marking would be on the longer one?

        Comment

        • Joe L.
          Beyond Control Poster
          • February 1, 1988
          • 43221

          #5
          Re: 67 300 w/A.I.R. intake manifold bolt locations

          Mike-----

          I believe that "C" or "M" were 2 of the headmarks found on the longer bolt for the right forwardmost position. Very possible there were others, too.
          In Appreciation of John Hinckley

          Comment

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