That's really cool stuff and great photos. Thanks for posting them, I would love to see more.
Regarding the points. My understanding is that the engine came a as a Complete unit (w/ dist) and was bolted in from the bottom. The only reason I could see a Factory worker putting them under the seat would be that the car did not run properly once the car was together. I'm not sure what the factory did in those cases but some of you might. I would think they would have had an area where the car was taken so someone could troubleshoot the problem. If the points aren't worn, then perhaps someone did put the under the seat to quickly dispose of them but I wouldn't think that would be too likely. If they are worn, then I would think they found their way under the seat after an early tune-up on the car.