This detailed illustrated history describes the emergence in North America of the 500cc displacement road racing cars known as FIIIs. It ranges from the start in 1950 right up to current Vintage racing, with descriptions of the cars, courses, organizations holding race events and the people involved, outlining the vast differences from the east coast vs. the west coast. This book also contains much road racing history (1950-1964), apart from that of the FIII class. Appendices cover surviving cars, racing organizations and more.