During Pete's brothel visit, "Get Back To The West Side" by The Steam Machine is heard playing in the background. This episode takes place in May 1968; however, the song wasn't released until 1971.
The episode takes place in May 1968. The Chevrolet that they are pitching for was the new Corvette C3 model, which is shown near the end of the episode. It is so secret that the ad agencies can't even get a drawing of one to work from, but that body style debuted in August 1967 for the 1968 model year.