The best place to mount a steam whistle in under the running board. The running board keeps the whistle's condinsate off of the rest of the car. It also shields the steamer's occupants from the loud whistle melody. The worst place to mount a whistle is between the head lights. With it mounted there you also get your windshield washed at the same time that you blow your whistle. No windshield? Then you would get your faces washed instead.