I Remember those land yachts well. My uncle had a 74 Grand Prix, last year before they went with the rectangular headlights.
The drummer of the 70's garage band I played bass in as a teen had a really nice gold 75 Grand Prix. I believe it was actually the last year for the round headlights, not 74. One of my dream cars is a 76 or 77 Grand Prix, done up pretty much like this 76...