The registered trademark of the vehicle belongs to the 1202 group of cars, trams, motorcycles and their parts in the Nice Classification of Trademarks12.

In the category of 12, tractor 1202, trailer 1202 and trailer (vehicle) 120056 are all tractors and trailers.

As for the trademark registration of the modified car you mentioned, it depends on the purpose of the modified car. For example, you can choose light truck 1202, van 120076, truck 120022, etc. Bus 1200 18, bus 1200 19, sports car 120 178, camper 120249, RV/kloc-0. It also depends on the specific purpose of your modified car.