[dingo_bat]

I don't think the factory is 40 years old. They built it in the last 5 years.

[csours]

The structure is basically the same one GM completed in 1962 https://en.wikipedia.org/wiki/Fremont_Assembly

The insides are all new (and now some of the outsides, too!)

[jcims]

I'm no pro but I've worked in a few auto assembly lines. They are constantly reworked and the only real support they get from above is lighting and HVAC. Stamping isn't going to get moved very easily, but most other processes are pretty much bolted to the floor. As long as you have power and reasonable environmental control I don't see why it wouldn't work. It's ghetto but whatever.