 Complete the following phrase:  The car was designed by Harvey Postlethwaite, previously responsible for the Hesketh 308 in which James Hunt won his first race. Wolfs former driver Jody Scheckter left the team at the end of , going to Ferrari, where he would win the World Championship. He was replaced by 1976 champion James Hunt. When it was found that Hunt was unable to fit into the a hrefWolf20WR5Wolf WR56a chassis, a new car had to be built in a haste prior to the season opener in 