72 350 and TH350 troubleshooting?

[kna4977]

Originally Posted by RustyPile

I agree with others, but something about the gauge that you're not understanding.. When the ignition switch is turned off, all power is removed from the gauge. What the gauge does then is of no consequences and is not an indication of coolant temperature.. The needle is simply seeking a "comfortable place" to rest...

I understand the gauge. It stops at its last reading until the switch is turned on again. When I say off and list the temps I’m seeing those are from my infrared thermometer with the engine off not the gauge in the vehicle.