Corvette has modified last year’s GTLM class-winning C8.R car for IMSA’s new GTD Pro division, adding more weight and drag, reducing power, adding anti-lock brakes and replacing bespoke Michelins with customer S9 tires. However, despite some BoP breaks in the build up to the event, the C8.R proved uncompetitive against purpose-built GT3 cars and was…