As for the layout, there are several ways to lay out flames. Take your time because this step can make or break your job. Take a look at the vehicle and make the flames flow with it. Picture the front of the car on fire and going about a 100 mph, the wind whipping the flames back over the body of the car. Also, utilize the length of the car to make it appear longer and lower as an illusion. The longer you make the flames whip back, the longer and lower the car will look; if you stubby up the flames, say just on the fender, it will make the car seam short and stubby.