It's back to not starting, no power ... might be an ammeter problem.
The bulkhead looked fine, really, considering it has been operating for 50 years without any grease / oil to protect it. Just minor surface corrosion, nothing exciting.
I assume that I have a problem with the choke on my Holley 1920 carb. When the engine is cold, if I give the accelerator more than a tiny tap, the car sputters and nearly dies. It comes back to life when I take my foot off the accelerator. As it begins to warm up, everything evens out. That's why I think it's the choke. It'll be a fun and easy overhaul, or as easy as carbs get. There's no telling when it was last worked on, and whether the gaskets and such are ethanol-resistant.