Rubuta ci gaba don wannan sakin layi - Carroll ya koma Turai inda ya yi abokantaka da John Cooper. Yana tuka Formula Junior Cooper, ya lashe tserensa na farko. Bayan raguwar nasara a cikin motocin Cooper, wanda ya biyo bayan kimantawar mutum mai tsabta cewa ba shi da ikon tuka motocin tsere a mafi girman matakan, ya koma Amurka kuma ya fara aiki tare da Carroll Shelby da Kamfanin Kamfanin Ford a kan shirin GT40 Le Mans. Smith ya kula da shirye-shiryen motocin da suka lashe gasar 1966
da kuma 1967 24 Hours na Le Mans.