L’homme Au Cerveau Greffe (1971)

aka’s: The Man With The Brain Graft/
Man With The Transplanted Brain/
L’uomo Dal Cervello Trapiantato

A dying surgeon (Jean-Pierre Aumont) has his brain successfully transplanted into the body of a race car driver (Mathieu Carrière) who was dying of a brain injury. Complications arise as the doctor, in his new body, discovers that his own daughter (Marianne Eggerickx) was the lover of the race car driver. Also stars Nicoletta Machiavelli. (In French language).

Note: The picture quality for this film is a bit soft, but very good and the best currently available anywhere.