Norway is not a part of the EU so you will have to pay tax.
Furthermore make sure that you have the right export permit on the Dodge, since it is a historic military vehicle, it will require a permit from the Defense museum and the Foreign Office/Ministry.
It is not a problem to get these (it is the sellers job) on something like a dodge, but the processing time can be a bit long.
They had an incident where one creatively exporting some of the Volvo tracked personal carriers to Africa, so I would not try and circumvent the correct papers.
I have imported two vehicles from Norway to Denmark a couple of years ago