Rubuta ci gaba don wannan sakin layi - Ruby kuma yana da nasara biyu na tseren jimiri a cikin Sa'o'i 24 na Daytona (1965<unk>1966), a lokuta biyu tare da Ken Miles. Ruby da Miles sun haɗu don cin nasarar Sa'o'i 12 na Sebring na 1966 da kuma Gasar Wasanni ta Duniya ta 1966. An tsara Ruby don yin tafiya a cikin 1966 24 Hours na Le Mans
, duk da haka an tilasta masa janyewa saboda raunin kashin baya da ya samu a hadarin jirgin sama. Bayan shekara guda, ya haɗu da Denny Hulme a cikin Ford GT 40 Mk IV don 1967 24 Hours na Le Mans. Ruby ya taka muhimmiyar rawa a cikin shirin GT40 na Kamfanin Motocin Ford a tsakiyar shekarun 1960. Ya kuma yi tsere a 1961 United States Grand Prix.