27 August; it was won by Jack Brabham with his New Zealander teammate Denny Hulme completing a Brabham 1–2. The 1968 event, which was moved to late September so it could be paired with the United States Grand Prix at Watkins Glen, saw the unlucky New Zealander Chris Amon lead from the start until 17 laps from the end of the 90 lap distance when his gearbox broke; the McLaren team finished 1–2 with Amon's countrymen Hulme and Bruce McLaren taking top honours. Following the 1968 season, a group led by John Bassett and race sponsor Imperial Tobacco developed a proposal to move both the Grand Prix and Mosport's Telegram Trophy IndyCar race to a new street circuit in Toronto along Lake Shore Boulevard and through Exhibition Place with the start/finish line and pits to be located inside Exhibition Stadium. Bassett dropped the idea just as the bill was going through third reading before Toronto city council. The idea to move the race to an urban location would return a decade later. The 1969 event at Mosport Park saw Briton Jackie Stewart climb up from 4th to take the lead, but Jacky Ickx was coming up fast, and Stewart and Ickx battled until lap 33, when they came to lap privateer Al Pease for the fourth time, Ickx attempted to pass Stewart, and the two cars collided. Stewart was unable to get his Matra going, but Ickx did get his Brabham going, and held onto the lead until the checkered flag. An angry Stewart complained to his boss Ken Tyrrell about Pease, who complained to the organizers. The 48-year-old Pease was then given the black disqualification flag after completing less than half the number of laps the leaders had completed in an almost embarrassingly outdated Eagle-Climax, and became the only driver in F1 history ever to be disqualified for being too slow. The 1970 event saw Ickx win again with his Swiss teammate Clay Regazzoni making the result a Ferrari 1–2. But the Mont-Tremblant circuit was not used again for Formula One because of safety concerns regarding the bitter winters seriously affecting the track surface and a dispute with the local racing authorities there in 1972. The alternating of the race stopped and Mosport solely continued to hold the Canadian Grand Prix from 1971. The 1971 event saw Mosport Park flooded with rain and fog; the main event was delayed