Once you drop off the old man at the (train station? whorehouse?), the Citroën GSX turns you into a total menace on the roads; you'll be beating your chest and howling- and we mean literally howling- with the sheer macho joy of its mighty 65-horsepower engine. It's too bad we found this ad after selecting the entrants for the Best Car Ads Of The 1970s poll, because we think it would have made a strong showing in the vote.