MC Assy Casting#5480346 - NCRS Discussion Boards

MC Assy Casting#5480346

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  • George D.
    Very Frequent User
    • August 31, 2000
    • 225

    MC Assy Casting#5480346

    This AC Delco Master Cylinder assembly was on my 1969 without power brakes. I would like to know what is is supposed to fit. It doesn't have the bleeder screws by the fittings. I found an article in Corvette Fever which says it fits a 67 with the J56 option. Is this correct and what is the value.

    Thanks
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43206

    #2
    Re: MC Assy Casting#5480346

    George-----

    GM casting #5480346 is a 1-1/8" bore master cylinder and it was used for 1967 applications with J-56. However, it was also used for all 1968-76 applications with J-50 power brakes or J-56 HD power brakes. All 1967-72 applications, PRODUCTION and SERVICE, in which this casting was used had bleeder valves installed on the master cylinder. Consequently, the one that you have is a 73+ version. These are not particularly rare but it is probably worth about $50-100. Your car with manual brakes should have a 1" bore master cylinder, so the one that you have is not even functionally correct.
    In Appreciation of John Hinckley

    Comment

    • Brandon K.
      Expired
      • April 1, 1997
      • 474

      #3
      Re: MC Assy Casting#5480346

      The number is correct for a 67 w. J56, but it should have bleeders above the line connections on the left side.

      Comment

      • George D.
        Very Frequent User
        • August 31, 2000
        • 225

        #4
        Thanks, but no bleeder screws

        However, this one doesn't have the blleder screws. Any ideas.

        Thanks

        Comment

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