Conversation so far:
what was Chris Amon's legacy?
Chris Amon won eight non-championship GPs, the Silverstone International Trophy, the 1000 km Monza, the Daytona 24 Hours, the Tasman Series and, the 24 Heures du Mans.
did Chris Amon win any other titles?
what was the most significant title Chris Amon won?
Chris Amon's most significant win was the 24 Heures du Mans.
did Chris Amon set any records?
Chris Amon holds the record for the most different makes of car raced by a Formula 1 World Championship driver.

Question: how many different makes?
Self-contained rewrite: how many different makes of car did Chris Amon race with to hold the record?