Right, when I refer to “ key on hot”, I mean hot when the ignition switch is in the run position, or on position, not in the “ACC” position
The anti-backfire solenoid is a great suggestion for a place to tap that electric choke from
In my case, on one of my cars, I took the under dash energized in the “run” position wires, and installed a small, 4 fuse, power block, with modern fuses. I used this to feed my electric choke, audio, and gauges.
I did this because I did not want to hook my electric choke to any existing “glass” fuse feeds, that could cause failure of other important items (lights, etc) if the electric choke drew too mich current for the existing circuit
All of these cars are fifty years old, with 50-year-old wiring, and 50-year-old fuse blocks and technology
Good luck, keep us posted on your prigress!