It may end up like my truck with a new VIN number. It's no different than building a trailer out of steel stock you purchased, its inspected and a number is a signed to it. I had to take out a bond for three years to cover myself incase anyone came along to claim the truck as theirs, after that it was all mine. I needed a title, bill of sale or receipt for all major purchases, then each number was verified by the highway patrol and check to see if it was stolen, engine, trans, axle, brakes, and the new bed.
Go to your local office and find out what is needed, they have seen it all and should be able to help you, do nott try to fool them.