The video seems to contradict that assertion.Sadly that car has been rotting for a long time. It's missing a lot of it's original parts including it's engine which I have
Well, they think it's the original engine, anyway. This should be easy to resolve; didn't these items have casting and serial numbers?
BTW, is the "original" engine the one it was built with, or the one it won with? As I recall, race cars get engines changed out with some regularity, don't they?
That is what I would think. They had records of which engine was in which car, didn't they? I would imagine they kept logs. And if they tested the engine after the race, obviously they took it out of the car to do that. Did they put it back in, maybe?