It would not be a problem to change the car for the show. Your best option is to contact the host club's registration personnel with the car change as soon as you know there will be a change. They will need the VIN, body style, year, and color for the new car as well as the division. There are always situations that come up before a show ie.: accident, mechanical failure, unfinished restoration . . . that causes someone to bring a different car. This happen on such short notice that we do make changes for the owner at Classification. It is just very important that you inform the Classification team member that you have brought a different car. Please remember you fire extingusher!