Yes it will require new physics but its doable and easier to do if they use tracks that are exclusively off road tracks such as crandon, wi. They have essentially a stadium truck race track there that draws huge crowds every time they have an event.
Second pick baja and rally car events that are mostly off road routes that use mostly off road vehicles. Lastly restrict the car types that can be used which will help with physics.
Also other off road events that would work are legends, sprint cars, outlaws would all work as they are raced on tracks that are exclusively dirt tracks. Which there are dozens of dirt tracks to pick from in the united states.