The HVAC for the interior works just fine, the heater blasts out plenty of heat.
There is only 1 sensor. The older systems used 2. The thermostat has a big impact on the readings of the sensor. If the thermostat opens early, the reading will not go very high. These are inexpensive parts and usually the first things I replace.
The thermostat is behind the upper rad hose housing at the sensor. I usually don't remove anything to change it. I take the lower bolt out completely, then note the angle of the upper hose, remove the top and fish it out that way. But, that bottom bolt is tricky to get out, and back in. You won't need to remove the upper intake manifold.
I have to finish up tomorrow, but I'm sure it will be fine. Thank you very much for all of your help!
You guys rock, wish I knew about this site a long time ago! Thanks again for everything, have a good night.