Apparently, they're the same. I'd like to find out which museum it's supposed to be in. I thought there would only be some record of it stashed away for decades in some file at a warehouse in Long Island City, until it was put on computer.

I wouldn't expect a random truck like this to be in a museum, even if it appeared in this movie. Let's face it, the truck isn't exactly the Bluesmobile, and Up the Down Staircase wasn't the epic comedy that The Blues Brothers became.