So Steve, by reading Craig's suggestion,
1. I could install the sender on the DS where the fan switch is and
2. Install the fan switch on the PS and
3. Ground the single green wire for the idiot light and high speed fan to remain working?
no...he is suggesting to remove the high speed fan switch on top of the manifold on the drivers side...his reasoning is that this switch will never do anything on a car with a decent cooling system as it triggers way over 200 degs...take it out and put the aftermarket sensor in that slot...leave the two alone by the thermostat...easier than teeing into the one with the single green wire. The other must not be messed with as it feeds the ecm temp information which controls fueling.
Fan will still kick onto high speed when the ac is on.