first professional races run under Formula Atlantic rules in North America were conducted in 1974 by the CASC in Canada (now ASN Canada), drawing much attention and large fields due to its national CTV television coverage. IMSA in the United States took advantage of the large number of teams and organized their own series in 1976. During these years, the series attracted guest drivers from Europe, including Formula One, particularly at the Trois-Rivières street race in Quebec, Canada. Guest drivers included James Hunt, Jean-Pierre Jarier, Riccardo Patrese, Patrick Depailler, Jacques Laffite, Didier Pironi and Vittorio Brambilla. In 1977, the SCCA sanctioned the US events and in 1978 the CASC and SCCA series merged, and conducted the series jointly until 1983, when it ran as the Formula Mondial North American Cup and was won by Michael Andretti. The series could not sustain the success of earlier seasons and was cancelled for 1984. Formula Mondial was an international category introduced by the FIA in 1983 with the intention of replacing both Formula Atlantic and Formula Pacific, the latter being a variant of Formula Atlantic that had been introduced in a number of Pacific Basin countries in the late 1970s. Current FA SCCA Club Racing SCCA Formula Atlantic cars are allowed wings and ground effects. They use either the Toyota 4AGE engine or the Cosworth BDD. Cars meeting Super Vee specifications were also allowed but are now rarely seen. Prior to 2006 these rules were also largely used in the professional series except that all cars had to run a Fuel Injected 4AGE. This meant that competitive amateur teams could also participate in professional races and that old pro series equipment could be raced at the amateur level. However, in 2006 the pro series introduced a spec chassis, the Swift Engineering 016.a and a new spec engine, the Mazda-Cosworth MZR. The result was that the cars used in the pro series were drastically different from the amateur cars. In 2009, to shore up small race fields, the pro series introduced a "C2 class" for amateur level cars, primarily the Swift 014.a, the dominant chassis in amateur competition at the time. However the C2 class saw few entries and was abandoned in the middle of the season. Since 2011 SCCA Club Racing has allowed the Swift 016.a and Mazda-Cosworth MZR, albeit with an inlet restrictor to maintain parity with the older Toyota-powered cars. As