There's so much wrong and missing from this car I really don't know where to begin to find the source of this problem. The coolant temp gauge rests at around 1/3 all the time - doesn't seem to move. Common issue? Easily fixed? All fuses are good, AFAIK; some gauges have lights, other's don't. Speedo works, clock is dead, fuel gauge works, gen and oil lights seem to work properly. Provided that the temp sending unit is good, how would I go about checking the gauge? If I decide to slit my wrists and pull the dash panel out, what do I do first? If the gauge is dead, is it dead forever? Engine notes: 430 has been rebuilt using Edelbrock intake and carb, and they splurged on some chrome valve covers and accessory pulleys so I tend to think they didn't go cheap on the rebuild. I think they installed a HP cam because it's a little "lopey" but can't tell for sure yet, and no way to check at this point. I don't even know if they put a thermostat in the water neck. TVS has no vacuum lines going to or from it. Heater valve in the rear of the intake has a single vacuum port on it, but the entire heating hose system has been disconnected and blocked off. Worst case scenario, I just buy an aftermarket temp gauge and sending unit, but I'd rather not.