Cika wannan jumla: A farkon shekarun 1970, dan tseren mai son Yip ya hadu da Sid Taylor kuma ya amince ya dauki nauyin Vern Schuppan a Formula 5000. Wannan ya jagoranci Yip ya goyi bayan Schuppan a cikin Formula One tare da Ensign a 1974. An biyo bayan ƙarin shiga cikin Amurka tare da Schuppan sannan kuma goyon bayan Alan Jones a cikin jerin F5000 na Amurka a 1976. A Ostiraliya, Schuppan ya lashe gasar Rothmans International Series don Yip yana tuka Lola T332-Chevrolet a shekarar 1976. A wannan shekarar Yip ya kafa Theodore Racing. Taylor ne ya gudanar da shi kuma ya shiga Ensign don Patrick Tambay a F1. Bayan shekara mai wahala a 1977, Yip ya ba Ron Tauranac aikin gina masa motar F1. Motar, da ake kira Theodore TR1, ta kasance mai wahala kuma Eddie Cheever ya kasa cancanta a duka Brazil da
Argentina amma sai Keke Rosberg ya karbe shi kuma ya lashe gasar cin kofin kasa da kasa a Silverstone a cikin rigar, kodayake ya cancanci zuwa GP daya kawai a Afirka ta Kudu. An yi watsi da motar a tsakiyar kakar wasa. A Amurka, Yip ya goyi bayan kungiyar Dan Gurney ta Eagle.