Thanks for posting that Restoration Fan. Sure was great to hear it run, and the way it fired right off was very satisfying!
A few YouTube commenters mentioned that I should have applied some anti-seize to the JIS screws on the exhaust flanges. As I mentioned there, I can always pull them back out one at a time and apply a little anti-seize. In fact, I'll be pulling the exhaust back off so I can send out the flange clamps for rechroming.
Now I need to sort out the wiring. I have a new harness but I'm missing a couple parts of the kill switch and turn signal switch. Might have to buy some replacement units.