In the International Motor Sports Association (IMSA) RS series for compact sedans, Raleigh, North Carolina's "Team Highball", run by Amos Johnson and Bunny Johnson, was the AMC factory-backed team, with Amos Johnson, Whit Diggett, and later, Dennis Shaw driving. The torque of their 6-cylinder Gremlins gave a big advantage on the faster tracks like the Daytona International Speedway, where they were often more than a match for the BMW 2002, Alfa Romeo GTV, Datsun 510, Ford Pinto, Mercury Capri, and Opel Manta. Johnson was the series 1973 co-champion, while independent driver George Alderman took the 1974 title.