This bike is Willard Wolfe's Big Base privateer. Willard worked in the engine dept. at the factory and was responsible along with Jimmy Hill for assembling and testing all the 648 racers. He also had a dealership at 435 State St. in Springfield, and was rated Expert in all types of racing, gaining the most acclaim for his hillclimbing. This is a spare engine (not FDH ----) that he put in his existing race bike which has some pretty trick "factory special" stuff already. His plate # was usually 22.