Philip Baker Hall was 37 in Zabriskie Point when he played the character 'Diner Owner (uncredited)'.
That was over 54 years ago in 1970.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2022 he died aged 90, starring in 99 films in his career, 98 of those after Zabriskie Point was first released. If he were alive today he would be 92.
In Zabriskie Point, I think Philip Baker Hall looks: