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Thread: Holley #4777-6 4150 conversion to electric choke.

  1. #1

    Default Holley #4777-6 4150 conversion to electric choke.

    Hello, my name is Markus from Germany.
    I want to convert my Holley #4777-6 4150 double pumper carburetor to electric choke.
    There are two different e-choke conversion kits, 45-223 & 45-224.
    The 45-223 kit requires an internal vacuum source.
    The 45-224 kit an external vacuum source.
    Which kit is the right one? Thanks, Markus.

  2. #2


    You want the kit with the external vacuum source. The external vacuum source is what activates the piston pull-off on the electric choke housing. The 45-224 is what you want.

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