To remove the roof, squeeze the windows and the roof lifts off. You will see windows on each side that are thisker. They stand out, you will see them. The cars are loud because they are light. A small bit of weight will give you what you want.
On the pickups, I think they might be the same as the caboose. That is for the 4 wheel truck. I would look for something that would get the job done. The stock pickups like everything MPC made were junk.
