Historical clue formulations

• Al and Al Jr. of auto racing — 2013-09-16
• Famous Indy 500 family — 2005-09-25
• Family with a great track record? — 2003-10-18
• Famed family of auto racers — 2002-12-22
• Indy 500 family — 1997-01-05
• Racing brothers — 1994-05-01