 The fastest lap time in qualifying determines which team will have the number for the race, and which team must temporarily change the number for the race.For example, during the 1991 Busch Series season, there were selected races in the Northeast (Loudon, Nazareth, Dover, Oxford) where both the Busch Grand National and Busch Grand National North Series raced in combination races.North team Ricky Craven (also drove his car) and Grand National team Don Beverly Racing (Jimmy Hensley driving) both used No.