Thanks for the replies everyone.
I've owned the car for 35 years, and God willing for another 35, so its value has no impact on my decision. However, the 8-track and am/fm stereo are 2 of the only 4 options on the car (center console and unitized ignition being the other 2), so I am hesitant on ditching it right now. I guess it comes down to whether I can find (and spend$$) on a factory ac dash to use, as I hate to drill holes in the original non ac dash...
I appreciate all your thoughts.
Thanks.