For the introduction of the new V12 engine at the 1966 Italian Grand Prix, Gurney took the wheel of the new car, and was joined by compatriot Phil Hill in the older Eagle-Climax.
Do konca sezone 1967 pa že prek 400 KM, tako da se je lahko meril s Ferrarijevimi V12, Hondinimi V12 in novimi Cosworth DFV V8.