Tags: Motorsport Season.
The fifth year of IROC competition took place over three weekends in 1977 and 1978. IROC V saw the use of the Chevrolet Camaro in all races and the schedule was held over in its entirety from IROC IV. Al Unser won two races en route to the championship and took home $50000 for his efforts.The roster of drivers and final points standings were as follows:
