Whakaotihia te rerenga e whai ake nei: I te wā i whakamahia ai e Lotus rāua ko Clark e toru ngā motokā me ngā pūkaha rerekē. I kino te mahi a te Lotus 43 i te whakatuwheratanga o te Grand Prix o Awherika ki te Tonga, no reira i whakamahia e Clark tetahi Lotus 33 tawhito i te Monaco Grand Prix e whai ake nei, ka reti me te ngoikoretanga o te aukati. I reira ka tīmata a Lotus i tana hononga whai hua ki a Ford-Cosworth. Ko ta rātau waka tuatahi, ko te Lotus 49 e whakaatu ana i te pūkaha F1 tino angitu i roto i te hītori, ko te Ford-Cosworth DFV, i toa i tana whakataetae tuatahi i te
Ko te Dutch Grand Prix, e whakahaerehia ana e Clark. I wikitoria ano ia i te British, United States me Mexico Grands Prix; a, i te Hanuere 1968, i te Grand Prix o Awherika ki te Tonga.