Ka cika wannan magana: Carroll ya ƙaura zuwa Turai inda ya zama abokin 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 1967 24 Hours na Le Mans.