The Grand National East Series used a mixture of former Grand National/Winston Cup cars, as well as cars from NASCAR's Grand American series, which had also folded after the series' 1971 season.Donovan 2008, p. 215 The cars raced in the series were allowed to be up to four years old.Jackson 1973, p. 13 A significant number of events of the series' 1973 season took place outside of NASCAR's traditional southeastern stronghold;"U.S. Racing Showdown". Motor Trend, 1973, p. 124 in addition, eight of the season's fifteen races were co-sanctioned with the Automobile Racing Club of America. Over the series' two seasons, the majority of winners of its events were Winston Cup series regulars; Neil "Soapy" Castles won the 1972 Grand National East Series championship, winning two of the series' 15 races; Tiny Lund was the 1973 champion of the series, scoring five wins in 15 events.
