Welcome to the RACER Mailbag. Questions for any of RACER’s writers can be sent to [email protected]. Due to the high volume of questions received, we can’t guarantee that every letter will be published, but we’ll answer as many as we can. Published questions may be edited for length and clarity. Questions received after 3pm ET each Monday will appear the following week. Q: To gear up for the 500, I watched a DVD this week from Rare Sportsfilms about the 1972 race. One segment featured Harlan Fengler riding around the Speedway in a street car showing off IMS’s brand-new caution light system, which featured lights and numbers to keep the race cars going at a constant pace of 80 or 90...
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