Oh Man! That is really nice. You found a good one! I noticed the engine was running when you took the third picture, if it sounds smooth and runs pretty good then you don't have to worry about much except keeping it tuned up and oil changed, general upkeep stuff.
My son's '64 with that tranny is really a beast and the tranny is terrible. Won't shift until it seems too late (compared to TH350/TH400s) from first to second and it is sloppy. He hates it and is hoping to get a different tranny in the car some day. Your experience may be different but I have heard other people share similar experiences. Hoping your experience is better.
Again, I can't wait to see it in person!
BTW, I can't say anything intelligent about the gasoline, too many opinions out there
