The PO installed a mechanical temp gauge, which is no good - only drops to 190* when cold.
I assumed the sensor would be in either the t-stat housing, or in a fitting at the front of the intake. There are plugs occupying both places, but I see no free wire to connect a sensor. PO installed the mech gauge in the left head, but I don't see any available connection there either.
If I can find the wire, I can at least test the stock gauge's operation. Worst case I'll install an aftermarket gauge if the stock one is bad.
I'll be installing a tach and a trans fluid temp gauge as well.