Well yes. It runs and I drove it around the block (3 x 3 block) today to prove it. Now it needs some minor stuff like a new turn signal relay and to figure out why the headlight doesn't work. The lamp that came with the bike seems to be undersized for the retainer ring, and the other one I picked up is way over sized.
The last bugaboo seemed to be a pair of hopelessly fouled spark plugs although cleaning out the float chambers and jet passages can't hurt. The insides of the carbs looked quite clean.
Runs nice, sounds nice, and even idles thanks mostly to having the right switches on the handlebars. Makes me wonder if the original voltage regulator is in fact good after all.
At this point I could get insurance and a plate for it. Only problem is that the DMV is closed for the weekend. Oh well, Monday. Meantime I can work on the petty details.
UPDATE: Seems the headlight lens for this thing lists for $127 and the turn signal flasher/relay assy is $163. Seems awfully steep for relatively ordinary parts. They also seem to route a lot of the rest of the harness through the flasher relay widget so simply switching to more common parts is a bigger deal than it should be.