By lap 40, Stewart was 26 seconds ahead of Hill, with Gurney and Surtees another 10 seconds Hill. He then sent a message to the rest of the racers by posting the fastest lap of the race on lap 52, widening his lead to 31 seconds. Hill had struggled for a while with a loose steering column, to which he said he was driving crouched up. On lap 97, a minute and twenty seconds ahead of Bruce McLaren, Jo Siffert's Lotus began to sputter, and he signaled to his pit that he would stop to refuel in the next round. As Siffert then exited the pit lane, McLaren went by into fifth place. Siffert regained the position after two laps, before which McLaren too had to stop for fuel. Surtees then began to back off when he realised Gurney, just ahead in third place, was slowing down because he had a slow puncture and was also running very low on fuel. Surtees used the opportunity catch up with Gurney's McLaren in the last lap, as they both finished a lap down to the leaders. Stewart led every lap in his Matra-Ford and was threatened only once, when he rounded a corner to find two spectators walking across the track. "It's as close as I've ever come to running somebody over," he said, "I missed them by an inch." It was his first American Grand Prix victory and kept alive hopes for his first World Drivers' Championship with just one more race to go. "It was the first time in my F1 career I felt I could dictate the pace," he said, "When I went faster, the field went faster. When I went slower, they went slower. It was an extraordinary moment of realisation." The race promoters claimed that Stewart's prize of £8,300 for winning the race was the richest in F1 history. Andretti's Lotus teammate Hill, also in the running for the season's title along with Denny Hulme, finished 24 seconds behind Stewart in second place. This was the final all-British podium, . Classification Qualifying * Pescarolo also drove car number 21 as a spare car. Race Championship standings after the race Drivers' Championship standings Constructors' Championship standings Note: Only the top five positions are included for both sets of standings. References Further reading Doug Nye (1978). The United States Grand Prix and Grand Prize Races, 1908-1977. B. T. Batsford.