Yes, it should sit level (unless it is a raised rail car, then it will lean to left). However, you will never find a cement floor that doesn't have some dips and high spots, so don't judge a car by that. If you really need to know, take it Tony Beaber or someone else that has a frame jig or table that you know is flat. Even then, if there is a weld on the bottom of the car that stands up a little high, or a nerf bar spud slightly angled down-the car might still rock a little.