Well I started my guage swapout. I had an extra amp/fuel, and an extra clock, so I decided to get those ready and would swap them out when time permitted. Well inbetween naps of my 1 year old I found some time to get the glove box out and remove my factory clock. It was quite easy with the glove box out of the way. Well the first thing I noticed was the font on the replacement clock was different. This worried me. To make sure I was not wasting time on the clock, I removed the voltmeter from its holster (what, you don’t have a fluke voltmeter as a sidearm) and testing the blue wire which according to the wiring diagram should be a 12v source. Wait, let me back up. There are three things that go into the back of a 1971 clock housing. The light bulb, WHICH JUST PULLS OUT. I must have rotated it about a skillion times before I realized it just pulls out! So don’t cut those nice OEM wires in your dash people, just gently pull out the factory bulb. But I digress. So you have the bulb going into the back of the guage, and you have a small rubber grommet with a black and a blue wire coming out of it. The blue should have 12 volts constantly even with the key out of the car. Which makes sense as the clock would only work when the car is running, which is great if you have an outboard engine in your car and you need to know the hours on it, but otherwise, you want 12v constant. The black is of course a ground. So when I tested my blue wire, it did in fact have 12.6 volts. Yeah. Next step was to make some jumpers to hook up my battery straight to the clock. NO dice, my clock was non functional. I suspect it’s a rather simple fix though. AS all my gears turned smoothly and nothing looked out of place. I may try to replace the lone resistor soldered to the wires to see if that helps, but that’s another day. Next step was to hook up my spare clock, with the slightly different face plate. And curiously, my spare clock had the word “QUARTZ†on the bottom. Remembering that there was a website called www.zclocks.com I looked at that and sure enough, it appears to be one of his. The face plate, and rear case were identical to the ones pictured on the website. When I took it apart, it had a very modern looking plastic case that was white but tranasparent where you could see the clock mechanism. When I hardwared it to the battery, it immediately began to tick. YEAH. Only problem is the backing of the guage has no place to mount it to the chassis like my stock guage. Unless I fabricate an L-bracket and epoxy it to the back, I am not sure what to do. Picture three below shows the lack of any mounting hardware, so any ideas? http://www.zclocks.com/images/portfolio/clock-1.jpg http://www.zclocks.com/images/portfolio/clock-2.jpg http://www.zclocks.com/images/portfolio/clock-3.jpg