Any idea what they do to modify the suspension? I rented an Isuzu once with a van box on the back. With a pretty good load in it the ride was bad. With very little load in it the ride was comical, perhaps even dangerous to your health. Do they have to replace everything and start from scratch?
The pop ups seem to be the only way to get the height down to reasonable. On a Benz Sprinter or the new (to the USA) Ford and Fiat vans, the top could be hacked off and still have plenty of head room - but it would be a project for sure.
