Tophat. I don't see a problem here. In line with what John said, I say she needed a number to put in a box for original price. She does not care what the number is. It Just has to come from you. She asked what weight you wanted to register it at. That seems fair enough. It's probably used for the fee she will charge you for registration and for yet another box that needs filled in. Put down what it says on the door. It probably signals an inspection required. The inspection is probably required because of the size of the truck. Big trucks are more dangerous to the public than small trucks. If it's going to be on the road, that's all that matters. A parade or on the freeway. Their safety equipment must be in good working order. Brakes, tires, etc. The AZDMV never sees any of the trucks I register.
The folks down there can be a headache, as they are everywhere, but let's don't manufacture a problem when she is just trying to complete your registration and ask about the truck so as to prepare the papers for you before inspection.
She has no interest in what exact insurance you get as long as you have the minimum liability insurance required.
As Kevin said, NADA has original MSRP listed when you search a vehicle. The 1946 1 ton stake bed was $1235 new. That's a start. Figure double and be in the ball park.
Be careful not to cause yourself trouble. When they ask you a question and allow you to decide, and they are ready to complete the task at hand, answer and get it done with. Your guess is a good as theirs. Don't get hung up on that stuff. If the inspection guy does not like your best effort on numbers, he will change them. So what. If you put down some number other than what is on the door because you went and weighed it, you are asking for delay. Don't talk, don't bring up rivets and VIN plates. Don't bring up anything. Answers are short and sweet and sometimes it's "I don't know".
