Roger Penske, a longtime collaborator with General Motors and Chevrolet, celebrates his 60th year as a team owner and served as Grand Marshall for the 74th Mobil 1 Twelve Hours of Sebring IMSA race . The Sebring race, held at a venue that was historic in the development of the original Corvette Grand Sport, not surprisingly was used to tease the upcoming 2027 Corvette Grand Sport. The C8 Grand Sport will be revealed on March 26.