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all about combo and prop valves:

Discussion in 'The Garage' started by R72K5, Feb 17, 2004.

  1. R72K5

    R72K5 Banned

    Mar 5, 2001
    Likes Received:
    central IL
    read up here: http://www.babcox.com/editorial/bf/bf50014.htm

    alos remember that with the gm trucks 1970 and older were just combo valves distribution blocks and all 1971 up were combo and proportioning all in one housing with the advent of disc front brakes in year

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