Historical clue formulations

• Chevrolet muscle car — 2021-02-15
• Sporty Chevy — 2020-06-21
• Mustang alternative — 2017-12-21
• Chevy's response to the Mustang — 2017-08-16
• Firebird alternative — 2017-07-29
• Mustang rival — 2016-07-17
• Many-time Indy 500 pace car — 2016-06-19
• Car featured in the "Transformers" movies — 2014-07-27
• 1966 answer to the Mustang — 2013-11-06
• Sporty Chevy — 2013-03-14
• Old Chevy — 2005-12-21
• Trans Am rival — 2001-02-14
• Chevrolet introduced in 1966 — 1998-07-24
• Sporty car — 1998-06-28
• Mustang competitor — 1997-01-11