Hansgen arranged for Donohue to become his teammate in 1965, co-driving a Ferrari 275 at the 12 Hours of Sebring endurance race, which they finished in 11th place.
Hansgen dispuxo o necesario para Donohue fora o seu compañeiro de equipo en 1965, co-pilotando un Ferrari 275 na carreira de resistencia das 12 Horas de Sebring, que terminaron no 11º lugar.