Their efforts attracted the interest of Italian sports car manufacturer De Tomaso, who built a Formula One chassis (designed by Gian Paolo Dallara) for the 1970 season. However, the car was initially uncompetitive, failing to finish the first four races of the year. In the fifth, the Dutch Grand Prix, the De Tomaso 505/38 flipped and caught fire, killing Courage. The death of his friend seriously upset Williams; the subsequent distance the team principal placed between himself and his drivers has been attributed to this event. The team soldiered on, however, first with Brian Redman, then with Tim Schenken. With no results, the partnership with De Tomaso was dissolved.