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?
of course These modifications must be permanent. If you use a van or light truck without the required modifications, then you must register it in the 'Commercial' registration class.