Update #2:
I took it to the track and borrowed the shop's heat gun. It eventually started!
I let it idle two tanks and put the heat gun to it to keep it around 200f, while running it very rich. Then I ran it about 1/2 tank slowly around the track in my new 8ight-T, spewing smoke. It was running 165f, so I put some foil on it. Then I leaned it just a bit, still smoking the place up and burning my eyes and nose with fumes, and ran it slow again.
It's got about 3 tanks on it now. I'm going to take it to the track again tomorrow and break it in some more.
I'm thrilled as a pig in poo that it started up. Even running very rich, I can tell there's a pooload of power waiting to come out.