[Mark IV]

The title and registration in NY are tied together. No registration, no title. NY no longer does a "title only" process where you could title but not register/license a vehicle.

Have you talked to the DMV? You can show them copies of the existing out of state paperwork and they can confirm if it will be accepted at face value or that you will need to go through the full process like a new build. As indicated some of the process will depend on the state the current title is from.