A manual choke is simple if you remember to use it. And as you have a 1966, I bet you do not mind having to actually drive a car. My first vote is to install a new choke cable and make sure the flap and carb linkage is not binding. That is the cheap, easy and reliable answer.
Electric chokes are easy to install IF a kit is available for your carb. What brand and model is your 1bbl? If you had a Holley 2 or 4bbl, there would be a kit that screws on and requires a full 12v switched power source. (Do not use the power wire for the ignition. It is switched, but is either a resistor wire or has a resistor for some brands. This will slow the opening of the choke.) After you adjust the timing (tightness) and the screw that hits the high idle cam, (this will take some puttering and a number of cold starts), you can forget about it.
I doubt switching carbs is practical unless you also switch intake manifolds to one that is made for a 2bbl. I am picturing that you would need an adaptor to fit a 2bbl carb, so there would still be a restriction at the base of the carb. (Feel free to correct me if the 66 200 6 manifold is not 1bbl specific.) Clifford is one place that can get you a manifold for a 2 or little 4bbl carb.