Indianapolis Motor Speedway, Indianapolis, INJune 12–14, 2015 A 1963 Watson Roadster leads a 1968 Gerhardt into Indy’s Southwest Turn.Photo: Dan R. Boyd Jeffery Walker in his Group 5 1970 Elden.Photo: Jim Hatfield Seven liters of Ford V8 power propelled Jeff Kline’s Ford MklV around Indy’s road course.Photo: Mike Matune Jr. In the featured ProAm Race, Rick Blaha’s Corvette runs off course in the early laps.Photo: jim Hatfield Jerald Dulski’s 1972 Datsun 240Z leads a pair of 1972 Alfa Romeo GTVs, Terry Stahly in #32, and Vince Vaccaro in #99.Photo: Dan R. Boyd