C3-1978 Master Cylinder Casting #? - NCRS Discussion Boards

C3-1978 Master Cylinder Casting #?

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  • Barry #41479

    C3-1978 Master Cylinder Casting #?

    What should the casting # be for a 1978 with build date of May 25, 1978? In looking at the Judging Guide it only lists that it should have a broadcast code of YC for later 1978 models and a Julian Date Code. Is there any other casting number that I should look for when buying one to replace the non-GM that is currently installed?
  • Paul B.
    Very Frequent User
    • April 30, 1995
    • 482

    #2
    Re: C3-1978 Master Cylinder Casting #?

    Barry, I believe it is "549046". The xxx509 ones were non power brake master cylinders. This "549046" number will face the engine when the m/c is installed on the car.

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    • Barry #41479

      #3
      Re: C3-1978 Master Cylinder Casting #?

      Thanks Paul. I will start the hunt and see what I find.

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