This weekend, Gabby Chaves and the #88 Harding Racing crew will be at the Raceway at Belle Isle Park in Detroit, Michigan for the Chevrolet Detroit Grand Prix presented by Lear. The 23-car field will race for 70 laps on a 2.35-mile, 14-turn temporary street course this Saturdayand Sunday in the only doubleheader of the 2018 Verizon IndyCar…