Hi all. I am new here and owning my Stang for 15 years I don't know why I haven't been here sooner. Anyway, I have a 69 mach 1 with the 428CJ. The car is all stock and is my baby. She is showing signs of age on the restoration and I am now looking at more functionality than originality. I have always had minor problems with the hot air choke pulling off at highway speeds as the choke housing cools. I don’t have the proper heat shields or a snorkel so I am sure that plays a huge role. I am looking at switching over to an electric choke and was wondering if someone can give me the proper part number. Holley offers 3 and the one I need depends on internal vacuum, external vacuum and something else. Going to the Holley website and doing a search for “electric choke conversion kits” will list the three.