Mark Robbins designed a new machine centered around a Craig 8-track tape player. AM/FM stereo with a tape player was optional. Its popularity was reinforced with its use on the Walkman portable tape player in 1979. Front disc brakes were a new option along with a stereo 8-track tape player. Pearlie unknowingly helps by pulling the plug on Twinkle-Twinkle's tape player. An AM/FM stereo radio with a tape player was $363. Layton wires the bomb trigger to the car's cassette tape player. An 8-track tape player was also available as an option. Plus, Pontiac added an 8-track Stereo tape player. New options for 1967 included front disc brakes and a stereo 8-track tape player. This album, like those before it was recorded with a consumer grade tape player. By the 1967 model year, all of Ford's vehicles offered this tape player upgrade option. Another delete option replaced the 8-track tape player with a cassette player. Mars stops the tape player, removes the cassette tape and begins singing his song.