When Dave Wall of Kansas City, Missouri, failed to show for qualifying, Schrock hopped in the car and turned in the seventh-fastest time of the 89 cars that would attempt to qualify.
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Vern Schrock of Middlebury, Indiana became the most improbable of winners, as he went from spectator to event Champion in winning the fourth running of the Winchester 400.
1973 | Winchester | Winchester College | Winchester, Virginia | Bishop of Winchester | 400 metres | 1973 in music | 1973 oil crisis | Winchester Cathedral | Forbes 400 | Simon Winchester | 400 metres hurdles | 1973 Chilean coup d'état | Winchester, Massachusetts | men's 4×400 m relay | Athletics at the 2008 Summer Olympics – Men's 4 × 400 metres relay | 1973 Women's Cricket World Cup | Boeing 747-400 | 1973–74 in English football | Diocese of Winchester | Winchester Repeating Arms Company | The 400 Blows | Athletics at the 2004 Summer Olympics – Women's 4 × 400 metres relay | 1973 in film | 1973 in baseball | 1973 Grand Prix motorcycle racing season | X.400 | Athletics at the 2012 Summer Olympics – Women's 4 × 400 metres relay | Æthelwold of Winchester | 4 × 400 metres relay |