The clock works are all pretty much the ame. That being said, I would not use an original style clock that has the contact points and spring wound mechanism, I would opt for a quartz rebuild kit.
Is the 80 a quartz movement? I did not know that there was an anaolog clock in the 80 models. I thought that the clock was part of the radio and that the 80's had an oil temp. gauge instead of a clock.