They've uploaded more about the Jimmy General yes, they're gonna restore it back to the way it was purchased by Universal Studios. Yes unfortunately it's powered by a Cummins engine and came out of the factory with a spring suspension and now has air but, they're thankfully getting rid of that air suspension it has and going back to the springs she was born with.
https://www.youtube.com/watch?v=1jRjVqtNn0c
Here's one of the General getting a bath
https://www.youtube.com/watch?v=937LKXKCAoY