BROWNSBURG, Ind. (June 17, 2019) – Rahal Letterman Lanigan (RLL) Racing will officially unveil the previously announced fan-favorite livery on the No. 15 Gehl / Manitou entry for the REV Group Grand Prix at Road America on June 23. The design is a throwback to team co-owner and former Indy car champion Bobby Rahal’s 1994 Lola-Honda…...