You can register a pickup in the 'Passenger' class if it meets certain conditions, depending on its empty weight
And it doesn't matter if my truck is modified?
If your modified or unmodified pickup truck has a curb weight of less than 6,001 lbs. , you can register it in the 'Passenger' class if it meets the following conditions:    the truck doesn't have any commercials    the van is used exclusively for non-commercial purposes
and is it very necessary that the modifications be permanent?