Not surprisingly, the clock on the 81 doesn't work. Parts Place has them for
$50. If it can be tinkered with, I would of course prefer to do that.What is
it that normally causes these things to quit? Are they fixable or are they
disposable?

The speedo works but sort of "chatters" at low speed and the needle bounces
wildly when at a crawl. At speed it works fine. Some times it's fine,
othertimes it's very annoying. The cable connecter is snugged up to the
speedo. When I had something like this on another car, I found a gear
actually loose on a shaft and a drop of loctite secured it. Anyone else been
through this drill that can give me a headstart before getting into it?

Thanks for your help,

Weston