July 11th and 12th, 1970 saw the World Sportscar Championship return for the third race of the year in the United States. Watkins Glen would host the Six Hour endurance race on Saturday and the Can-Am race on Sunday making it a double-header for some of the teams and drivers.
Porsche came into the weekend on a roll, having already clinched the Manufacturer’s Championship and having recorded their first overall victory at Le Mans. Ferrari had a poor race at Le Mans and hadn’t been close to a victory since Monza in late April. John Wyer’s JWAE/Gulf-Porsche team had a truly disastrous race at Le Mans and were looking to regain the dominant form they had shown most of the season.
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