Rubuta ci gaba don wannan sakin layi - Farawa a 1958 tare da Lotus VI a cikin gasar 1172 a 1959, Hart ya haɗu tare da Len Terry don fitar da Terrier Mk2 a cikin gasar kuma ya lashe Chapman Trophy. A cikin 1960, ya tuka motar Terry ta gaba mai amfani da motar Formula Junior Terrier Mk4 kuma ya kirkiro kan saukar da kai don injin Ford Anglia da ke tuka motar. A Oulton Park a watan Oktoba na 1960, Hart ya sami mummunan haɗari tare da motar, wanda ya jagoranci Terry don tsara Mk4 jerin 2, wanda Hart ya kori a 1961. Motocin da ke da injin na baya yanzu sun kasance na fasaha kuma Hart ya sami nasara kaɗan tare da motar. Hart ya ji daɗin aiki mai nasara a matsayin direba a cikin nau'ikan motoci masu zaman kansu daban-daban. Ya yi gasa a cikin Formula Junior da Formula Three, sannan ya kammala karatu zuwa Formula Two tare da ƙungiyar Lotus Formula Two da Ron Harris ke gudanarwa. Ya yi gasa a cikin 'yan tsere na Formula One ba tare da yin amfani da motocin Formula Two ba kuma a 1967, ya cancanci zuwa Grand Prix na Jamus
a Nürburgring a cikin Protos-Cosworth.