Early vs. late '66 BB fuel pump - NCRS Discussion Boards

Early vs. late '66 BB fuel pump

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  • Steven S.
    Expired
    • August 29, 2007
    • 571
    #1

    Early vs. late '66 BB fuel pump

    What exactly changed with the BB fuel pumps in '66?

    Thanks,
    Steve
    Tags: None
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    • Joe L.
      Beyond Control Poster
      • January 31, 1988
      • 43195
      #2
      Re: Early vs. late '66 BB fuel pump

      Originally posted by Steven Snyder (47742)
      What exactly changed with the BB fuel pumps in '66?

      Thanks,
      Steve
      Steve-----


      Primarily, it had to do with the configuration of the nipple of the fuel pump inlet chamber. Early 40366 had a welded-on, curved tube; later used a "welded"-on, machined brass fitting.
      In Appreciation of John Hinckley
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        • Cecil L.
          Very Frequent User
          • May 31, 1980
          • 449
          #3
          Re: Early vs. late '66 BB fuel pump

          Any rough idea about when the change-over took place?
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            • Steven S.
              Expired
              • August 29, 2007
              • 571
              #4
              Re: Early vs. late '66 BB fuel pump

              Originally posted by Joe Lucia (12484)
              Steve-----


              Primarily, it had to do with the configuration of the nipple of the fuel pump inlet chamber. Early 40366 had a welded-on, curved tube; later used a "welded"-on, machined brass fitting.
              So it sounds like they would be interchangeable as far as function goes?

              Originally posted by Cecil Loter (3596)
              Any rough idea about when the change-over took place?
              February 1966 from what I have read was the approx. changeover point.

              Steve
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                • Joe L.
                  Beyond Control Poster
                  • January 31, 1988
                  • 43195
                  #5
                  Re: Early vs. late '66 BB fuel pump

                  Originally posted by Steven Snyder (47742)
                  So it sounds like they would be interchangeable as far as function goes?



                  February 1966 from what I have read was the approx. changeover point.

                  Steve

                  Steve-----


                  100% interchangeable as far as functionality is concerned. In fact, the AC type number did not change when the inlet fitting changed. So, as far as GM was concerned, they were the same pump.
                  In Appreciation of John Hinckley
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                    • Steven S.
                      Expired
                      • August 29, 2007
                      • 571
                      #6
                      Re: Early vs. late '66 BB fuel pump

                      Thanks Joe
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