37 Installation, maintenance, repair, and modification of wheelchair vans, handicap vans, lift vans, ramp vans, mobility vehicles and wheelchair lift vehicles; Repair, maintenance and modification of wheelchair vans, handicap vans, lift vans, ramp vans, mobility vehicles and wheelchair lift vehicles, namely, conversions, customizations, and upfits; Vehicle repair and maintenance consultation in the field of wheelchair vans, handicap vans, lift vans, ramp vans, mobility vehicles and wheelchair lift vehicles