Because in 1980 (when mine was made) CDs hadn't been finalized/gone mainstream yet...
Lol, my friend has a truck like that... 1956 Chevrolet. Doesn't even have power steering or power brakes, let alone any computers... And I don't like it.
you have one from 1980?! dang, lucky find.
What don't you like about it? Aiming, steering, breaks, no computers, no AC?