Yesterday it purred. Today it pukes at partial throttle.

What is the chance you knocked some dirt/ debri loose when working on the fuel line? I'm not sure "stock timing" is what you want, either. And please define "puke" That slang covers a hell of a lot of ground, including emitting coolant from the overflow at some point

Fair enough. It idles okay. As soon as any throttle is applied, it stumbles and acts like water is in the gas. It isn't a stumble like an accelerator pump not working, picking back up to a smooth rpm after the blip. (I did check the accelerator pump by looking down the carb.) It's a consistent stumble like all the plug wires got scrambled, and lasts as long as the throttle is open to anything above an idle.

There could have been dirt knocked loose somewhere in the line. Anything is possible I guess. Do you think a main jet could be plugged?