Hidden Vin #'s

I know this is an older thread but it's subject matter is current for me.

I looked at a Duster for sale on Craigslist. The seller stated that it was a '71 and the title states '71. But from the pictures of both the front end and real valance are '73 or '74. What's interesting is the VIN on the dash matches the title, '71. This normally wouldn't be an issue except that the car has an out of state title and to title the car in Colorado it has to pass a VIN inspection. I've been told that the VIN they check is not the dash VIN. I didn't think to check for other VINs and if I were to get the car and it fails the VIN inspection then I can't title it and the car might be confiscated as having an altered VIN.