probably a manual choke cable.


another possibility to think about.
back in the days, in COLD weather climates, a aftermarket fast idle cable was pretty common also. you could start the car. boost the idle with the cable, walk away and you didn't have to hang around until the car warms up to drive it. this way you didn't have to worry about the car stalling after the auto choke opened and the carb released the fast idle. a cable was much cheaper and easier than paying $$$ for a good tune up and repairing the carb on a car that didn't like to idle when cold. after it warmed up it ran just fine.