Biohazard
Been thinking on my cold start problem.
Basically, the choke valve is pushed too far closed by the thermostat. Should be a simple matter of bending the choke control rod, right? But why would I need to do that when it worked okay before? Using my own photos (once again) I believe I've happened upon the crux.
Reference the photo below, taken before I dissected the vehicle...
....and notice the thick carburetor base gasket. Going back a few pages, I stated that I was going to "go with the thin gasket" to which
sireland67 replied that he thought the thicker one was the correct one to use (you get several in a gasket kit). I believe he was right.
Switching the base gasket to a thinner one alters the effective reach of the choke control rod, closing it even further when cold. Ah ha!!