[Henry/Kokomo]

Mechanical temp gauges would be nice if you don't mind the way they look. Remember with the two stock sensors, the one with two terminals is just a switch that opens when the engine has overheated. The single terminal sensor is the one that operates the gauge. If the double terminaled one opens, the gauge goes to "Hot" because all power id cut off from the circuit.

I'd check the thermostats and coolant level first. Easy and cheap. Good luck!!