There's something about that pic that reminds me of Harrison Ford in "American Graffiti". It must be the hat and his facial expression. (Of course, Harrison Ford was pretty young when he was in "American Graffiti".)
I think it's because of that classic picture they used so much in advertising American Grafitti. Same positioning in a pick-up truck with a cowboy hat.
I never made the connection until you said it, and you're right!
Harrison Ford was in his 30's when he did American Graffti.