Aha, I know it well. All those are old heritage cars that have been purchased by private entities (read: people with deep pockets or lots of patience! :hehe: ) for restoration. I happen to know one of the board members and have been to the Shops on numerous occasions. That's also where the Mark Twain Zephyr is being restored for placement at Granite City Passenger Terminal.
@Dietrichj: They have a couple Long Island cars they're looking to sell real cheap!