I knew a guy that in 1966 jumped a freight train hauling new Pontiacs through Erie PA, up into NY state. He found a new GTO with tri power, and proceeded to take it off the car, then dumped it off the train, had a friend that was following the train in his car that picked up the intake, then followed it until it slowed to go through a town, and they jumped off. It was about 40 miles from where he jumped on.
I have no idea how fast the train average speed was, but it took a few minutes to find the car with tri power. I would imagine the actual removal was about 30 minutes with one guy doing the work. He wasn't a novice, he knew his way around Pontiacs. I know i could pull a brand new unit off in 30 minutes with just hand tools.
I had forgotten about him, until I read the first post....