 Complete the following phrase:  For the 1976 Formula One season, Canadian Walter Wolf had bought 60 of the team Frank Williams Racing Cars, agreeing to keep on previous owner Williams as manager. However, Williams left the team before the start of the 1977 season to form his new team Williams Grand Prix Engineering. Having run a renamed Hesketh 308C in 1976, Wolf now needed to build his own car, recruiting a group of talented designers for the job, spearheaded by Harvey Postlethwaite, who had worked at Hesketh Racing. WR1 became the teams first self-constructed car and it made an instant impression when Scheckter won on its début at the 