<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-1974, uPostlethwaite waklama imoto entsha ngokuphelele yeqembu, iHesketh 308, eyayilungele iSilverstone International Trophy, uHunt ayinqoba, eyenza i-championship yayo yokuqala eSouth African Grand Prix. Imoto yayinamandla, yathatha indawo yesithathu eSweden Grand Prix, e-Austria Grand Prix nase-United States Grand Prix  <response>: . futhi. Ngo-1975, izibonelo ze-308 zathengiswa kuHarry Stiller Racing, owanikeza u-Alan Jones i-grand prix yakhe yokuqala. I-Polar Caravans nayo yathenga i-Hesketh chassis, ngenkathi ithimba lokusebenza lishintsha i-308 ngoHunt. Ngesikhathi esifanayo, uHorsley wayethuthuka waba umphathi wethimba osebenza kahle futhi onekhono futhi ngaphansi kokuqondisa kwakhe, ithimba laqhubekela phambili. 