Off topic but the original owner told me he removed the pump and plugged the exhaust manifolds (still in them) the day he picked the car up....in the lot. He also had the dealer install a few items (on my shelves) So who is to say what took place before delivery except the one who picked it up.
Goes as far as another old post of mine. Guy's dad worked in a dealership so he had a special order SS Chevelle delivered without the 396 but ordered a 427 and installed it at the dealership. I was a little kid when I first heard the story, and witnessed a few heated debates over it. He still owns it, had no reason lie. If anything, at the time he wanted the car a sleeper.
But, I understand a very definite line between how it rolled out of the factory, and rolled out of the dealership.