The body gets mounted back on, and fenders fitted, if it gets fenders. Customer wheels/tires or wreckin yard stock goes on to make it roll on a trailer or transporter for shipping. I prefer to pre-assemble the roller before it leaves my shop to assure everything fits. I don't like to send out boxes of parts and then get a call later that something is missing or does not fit. If you get it in one piece, you can see how it goes together.