Get a divorced choke form a 1945 equipped motor. Rock has this one for $10 new.
View attachment 1715464665
Not sure if it would fit but it lists for a 75 225 w/1945 carb. Standard CV149
1975 DODGE DART 3.7L 225cid L6 Carburetor Choke Thermostat / Heater | RockAuto