1963 HP waterpump pulley - NCRS Discussion Boards

1963 HP waterpump pulley

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  • Jerry C.
    Very Frequent User
    • November 1, 1995
    • 741

    1963 HP waterpump pulley

    GM 3770245 pulley, do they all have part number on the pulley? JG says 7 1/2" but all I see are 7 1/8th. What is correct? Thanks in advance
  • Joe R.
    Extremely Frequent Poster
    • July 31, 1976
    • 4550

    #2
    Re: 1963 HP waterpump pulley

    Jerry,

    The 245 pulley from GM had the part number stamped on the inside at the pulley center shaft. I've just measured two 245 pulleys and they measure 7 1/8" to the outer edge.

    JR

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