I bought this cluster several years ago, tried to wire it up in my non-tach '76 K10, but I'm "electrically-challenged". At one point, I got the tach to work, but the other gauges wouldn't. Then I got the other gauges to work, but not the tach. 
This cluster uses an electrical oil pressure gauge, whereas my truck uses mechanical, so I had to try and re-pin my main harness plug (not difficult to do, just frustrating for me). I'd be willing to bet that if your truck uses an electrical oil pressure gauge, you'd have an easier time wiring it up than I did.
The tach may or may not work anymore. I know a speedometer shop could get it working again. http://www.tachman.com/oldsun.htm
One of the tabs on the housing was broken, but I epoxied it back on with some 2-part epoxy and its solid enough that I can hold the cluster up just by holding that tab.
The clear lens is newer; no fading and no major scratches on it. Its very clear and nice. One of its tabs broke, but it doesn't seem to matter.
If you're decent with electrical, maybe you can make this work. All the negatives aside, this is actually a really clean cluster. I just don't have the patience to try and make it work on my truck.
$80 obo + shipping, if applicable
This cluster uses an electrical oil pressure gauge, whereas my truck uses mechanical, so I had to try and re-pin my main harness plug (not difficult to do, just frustrating for me). I'd be willing to bet that if your truck uses an electrical oil pressure gauge, you'd have an easier time wiring it up than I did.The tach may or may not work anymore. I know a speedometer shop could get it working again. http://www.tachman.com/oldsun.htm
One of the tabs on the housing was broken, but I epoxied it back on with some 2-part epoxy and its solid enough that I can hold the cluster up just by holding that tab.
The clear lens is newer; no fading and no major scratches on it. Its very clear and nice. One of its tabs broke, but it doesn't seem to matter.
If you're decent with electrical, maybe you can make this work. All the negatives aside, this is actually a really clean cluster. I just don't have the patience to try and make it work on my truck.
$80 obo + shipping, if applicable
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