Yeah, I know - this has been beaten to death.
But I may have stumbled on to a fix that I haven't seen on either this forum or any other venue.
After taking several dash pods apart in my feeble attempt at mounting an oil pressure gauge, I finally got hold of a working clock, and decided to put it in and mount an oil pressure gauge separately. After CAREFULLY removing said clock to install it in my "new" cluster, then installing it, no go. So, I pulled the clock out, sprayed it liberally with electronic cleaner, then just a tiny amount of WD40, and hooked it up to a battery. Started ticking, then slowly stopped. Interestingly, though, as long as it was upside down, it would run fine! As I rotated it more upright, the pendulum would slowly stop. Pulled the two cover brackets off and noticed that the pendulum rides on what appear to be set screws. AHA!
So, I fired it up again (upside down) and very gently turned the bottom set screw one way. Pendulum stopped immediately. Turned it back the other way to where it was, then a fraction more. EUREKA! I can now mark the passage of time without standing on my head! Albeit at a deficit of a couple of minutes a day, but, hey, it's Smith's, isn't it? [:D]
At any rate, after a week, it's still ticking away happily, and now it's time to move on to finding a good place to mount the oil pressure gauge.
Hope someone can use this EXTREMELY valuable information! ~Snicker~
Best,
Mickey