Smog System Adjusting Brace - NCRS Discussion Boards

Smog System Adjusting Brace

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  • Louis I.
    Expired
    • December 1, 1991
    • 20

    Smog System Adjusting Brace

    I need some help finding out what is the correct Adjusting Brace for my car 1972 LS-5 (454, 4 sp)..... The Adjusting Brace mounts off of the water pump to the smog pump. It is not the "Bracket".

    I would appreciate anyone that may have a car similar to mine that could take a picture and send to me or someone to confirm that the correct GM # for this brace is 903 (last three digits). I think that it measures about 7.5 to 8 inches in overall length.

    Any help would be greatly appreciated.
    Lou
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193

    #2
    Re: Smog System Adjusting Brace

    Lou-----

    The AIR pump adjusting BRACE for your application was GM #3921903. However, neither this number, nor any derivative of it, appears on the part. The DEVELOPED LENGTH (i.e. the lengtrh of the piece if it were flat) is 10-1/4". The same brace was used for all 1968-74 Corvettes with big block and AIR. I don't think that this brace is reproduced.
    In Appreciation of John Hinckley

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