How long did they have it, do you know? First I would call DMV and see what they recommend. Make sure to call one not close to you. If they know that there is no paperwork, some people like to be a pain and make your life difficult. So call one you won't deal with in person until you have all your ducks in a row. In NY the first thing I had to have done was get it weighed. Luckily the weigh station employees were nice and asked me what I wanted it to weigh
( my second option was to register it as home made, and it was easier if under a certain weight
, but I wanted to try the "right" way first). In NY, once I had the VIN and weight
and bill of sale, it was just a matter of applying for a new title
then registering it. But like I said, call DMV and tell them all the details. If you don't like their answer call another. Let me know what they say and I will see what advise I can give you from there. Hope it helps!!!