Harmonic Balancer ID Needed - NCRS Discussion Boards

Harmonic Balancer ID Needed

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  • Larry B.
    Very Frequent User
    • October 21, 2010
    • 254

    Harmonic Balancer ID Needed

    I need a balancer for my '61 FI. Need to know what the below balancer is for. I can't get any numbers from it. Any ideas? Thanks





    Last edited by Larry B.; July 20, 2011, 06:51 PM. Reason: add
  • David L.
    Expired
    • July 31, 1980
    • 3310

    #2
    Re: Harmonic Balancer ID Needed

    The balancer looks like a 1966 or 1967 low HP balancer (GM # 3861968, 3861970, or possibly 3896904). GM # 3896904 is a service balancer that looks the same as the other two and is usually stamped "6904". In the thread below there are photos of an original 1966 Chevrolet 327 balancer stamped "E 6 F" (May 1966).

    Dave

    Comment

    • Larry B.
      Very Frequent User
      • October 21, 2010
      • 254

      #3
      Re: Harmonic Balancer ID Needed

      Thanks Dave. Thought it might be a '61 HP balancer..no such luck!

      Comment

      • Joe L.
        Beyond Control Poster
        • January 31, 1988
        • 43198

        #4
        Re: Harmonic Balancer ID Needed

        Originally posted by Larry Boksa (52359)
        Thanks Dave. Thought it might be a '61 HP balancer..no such luck!
        Larry-----


        While it's not an ORIGINAL balancer for a 1961, it should be 100% functional for your application. However, before I'd use this beat-up piece, I'd obtain a virtually identical new balancer which is available in the aftermarket for a rather modest cost.
        In Appreciation of John Hinckley

        Comment

        • David L.
          Expired
          • July 31, 1980
          • 3310

          #5
          Re: Harmonic Balancer ID Needed

          Larry,

          I agree with Joe.

          The 59-61 Corvettes w/ H.L. Cam, H/Per., used balancer 3764318 (6 1/8" O.D.) which was replaced with 3817684 in Nov. 1962 which was then replaced with 3861968 in Nov. 1964 which was then replaced with 3861970 in Nov. 1965 which was then replaced with 3896904 in June 1971.

          Dave

          Comment

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