Powerglide vacuum modulator hard line - NCRS Discussion Boards

Powerglide vacuum modulator hard line

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  • Jeff S.
    Very Frequent User
    • July 31, 1984
    • 384

    Powerglide vacuum modulator hard line

    '66 model year uses a 2-piece line from the transmission modulator valve to the vacuum source at intake manifold fitting. I'm missing the shorter 'top' piece which routes upward, then arcs around the distributor turning inboard & connecting to the vacuum port with a short piece of hose. I believe this line is 1/4" OD -- can someone verify this? If anyone has a pattern or drawing that might assist me in making the bend radii, that would be helpful.

    Thanks,
    Jeff
  • Russ S.
    Extremely Frequent Poster
    • April 30, 1982
    • 2162

    #2
    Re: Powerglide vacuum modulator hard line

    Long Island Corvette part number 58-25C

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