This has become the signature feature of a conversion van. A high top allows occupants to stand in the van without bending over. For structural purposes, a section of the roof is often left at the front and back of the van.
This has become a defining attribute of a conversion van. A raised roof enables occupants to maintain an upright posture within the van without bending over. Consequently, a section of the roof is often retained at both ends of the van for structural support.