June 4, 1972	Spring Nationals	Century 21 Raceways, Aurora, CO	AHRA Pro Stock	Irv Beringhaus
June 4, 1972	Spring Nationals	Century 21 Raceways, Aurora, CO	AHRA Funny Car	Tom McEwen
June 4, 1972	Spring Nationals	Century 21 Raceways, Aurora, CO	AHRA Top Fuel	Jim Nicoll
May 26, 1973	Mile High 150	Century 21 Raceways, Aurora, CO	NASCAR Winston West Series	Bob Kauf
June 3, 1973	Spring Nationals	Century 21 Raceways, Aurora, CO	AHRA Pro Stock	Dick Landy
June 3, 1973	Spring Nationals	Century 21 Raceways, Aurora, CO	AHRA Funny Car	Dale Pulde
June 3, 1973	Spring Nationals	Century 21 Raceways, Aurora, CO	AHRA Top Fuel	Don Garlits