In 1980 and 1981, Ford sold a CB radio as an accessory.
From the 1981 Dealer Facts Book:
CB (40-channel) requires optional radio. (NA w/AM or AM/FM monaural or in California on models under 3855 kg. (8500 lbs) GVWR w/V8 engine); microphone-mounted controls; digital channel display; last channel or favorite five channel memory; direct access to channel 9; automatic scanner; incl. special antenna and chassis mounts under driver's seat (Also incl special Inst. Panel mtd. speaker w/Stereo radio options.