My 55 is registered as a 55. My 48 Federal Motors Truck is registered as a 48 Federal. Also have a 50 Dodge registered as a 50. All three have modern drive trains and on none original chassis. None of these vehicles had a tile when I bought them. If you have the original data plate, then use the vin and data from your 56. They really don’t need to know what chassis and drive train you are using. At least that’s the way it works here in Tennessee. But then each state is different.