The ones I got came with Masonite floors. I don't think the standard Lionel floor will work. However, you can use Lionel or MTH coupler trucks pretty easily, or if you body-mount the couplers, any type of streamline era trucks. Since I was trying to model the early Amtrak era, I didn't worry about consistency. Some of my cars had skirts, most not, which is what you see in early Amtrak photos. The Lionel vestibule fits the OK shells, but I added a thin strip of styrene around the perimeter.