Got back from Colorado on Saturday night, dickerfanickered with it on Sunday.
It wouldn't idle because I had an unused vacuum barb sucking in atmosphere under the carb. D'OH!!!
Now it idles well. It was a little lumpy but I let it idle for a half hour and it smoothed out really nicely. Still some bad gas from last fall being burnt?
The big pain in the arse is that the new Accel coil wouldn't spark. I put the old coil on and it woudn't spark either. Cleaned off the terminals with a wire brush and tested the + lead to the coil. It would go from 11.9V to 0.04V. Very inconsistent. I would crank it and crank it without it catching, then turn the key off and it would kick for a split second. Then, I'd crank it again and it comes to life.
Tonight, I cycled the ignition a few times until I got a crank that also kicked off. If I don't turn the ignition on and off until I get a crank that fires the spark plugs, it'll just crank and crank without any catching. After it got warmed up really well, I turned the ignition off and then immediately cranked it again. Nothing. Fully warmed up engine and a second of being off, and it won't start again.
I'm guessing it might be a bad ground, as the dashboard's "FASTEN SEAT BELT" light stays illuminated the entire time the truck is running...even when the seatbelt is clicked! Otherwise, I'm not sure where the ignition problem lies ...