Hey Gonzo - Your right, by 77' they were not working anymore! I fixed a couple of sets, but the geared set up was the worst. Usually, they froze in the winter, then, the gears stripped opening them up! The geared sets were most prevalent on the 67' Camaro and were almost impossible to find parts for. The "other" type were opened by vacuum and usually just needed slight adjustments, tore apart and greased/oiled, and new vacuum hoses. Once you did all of that, viola!, they worked!!!
I remember the days..............
I agree Fuser Man, that is sweet! I also like modern "muscle" cars too, but part of the biggest joy for me was working on them. The new stuff is to difficult for me to do much with. Hell, I still change my own oil, brakes, shocks (when applicable), and a few other little things. But the internal stuff can't be done by us "backyard" mechanics much anymore. To much smog stuff!!!