In The Big Engine That Could, a group of regular guys and girls participates in The 25 Hours of Thunderhill, historically the longest endurance race on the U.S. road racing calendar. Not only that, they have selected an unlikely beast of a car to race -- the Ford Mustang -- an American icon that is bigger and heavier and technologically simpler than the competition. But they have a weapon, not exactly secret: the 450 hp Boss 302 V-8 from Ford Racing.