Wow!, that brings back memories. In my younger years I was a Tune-Up, Carburetor, Fuel Injection, and Ignition tech. Automatic choke systems are very misunderstood. I made a lot of money rebuilding the Motorcraft 2700 and 7200 Variable Venturi carburetors. I still have some parts and the service set for them in my tool box.

Was thinking of starting a retirement business out of my garage rebuilding carburetors for the vintage car market.