I think, but not sure on this, that there is a number on the frame too that matches the VIN I think that is what they were looking for. I also think they were checking for any parts that had been put on that may have been stolen. Once it came back ok they just signed off on the VIN that was on the door jamb. A friend of mine had to go through the same thing with a replica of a Cobra that he built before they assinged it a VIN.
I also found out the hard way that I could have driven the truck to the inspection station even though my 30 day tag had expired. All I had to do was call the inspection station and they would have sent me a letter saying it was ok to drive to the inspection and back--would have saved me $$ on a trailer rental.
Hope this helps.
Chris
