OK, here is what I observed today. I did not have someone to help me test the electrical aspects of the carb. The "toilet flush chain" seems to be throttle-related, in fact I can hear fuel flowing when I manipulate the lever in the engine bay. It looks like a regular throttle to me and my limited knowledge, however it's connected to that knob located at the driver's position. Odd. I got in the truck, it had been sitting for about 48 hours, and I did not touch the choke/throttle/mystery knob, I just put the key in and she fired right up. Faster, in fact, than if I followed the PO's directions and "choked" it first! I would say it cranked for 3 seconds, whereas if I choke it like the PO said to do, it takes about 10 seconds of cranking before it starts. Granted, maybe it wasn't a true cold start as the solar effect today is intense, but the engine itself hadn't been run in two days. What I mean is, the air temp is about 20 degrees, but the sun is out in full force and probably made the temp under the hood quite warm. My work car is dark-colored and was extremely hot when I opened the door today, despite the snow and ice on the car.