Is that two pin temp sensor necessary?

[FMS88]

There is a two pin sensor and a single pin sensor in the driver side of the block behind the distributor. I figure the single pin is for the dash gauge and the two pin is for the computer. I do not have a computer or pretty much any of the electrical stuff that came OE on this thing.

Can I use that two pin temp sensor hole for a grounding temperature switch to control an electric fan?

You're correct. The single pin connector is for the temp gauge; the two pin is for the computer. If there's no longer a computer, the two pin is now nothing more than a hole plug. You could use that for a fan thermo-switch, but keep in mind that it is before the thermostat. Typically the sensor switch is after the t-stat, either near the top or the bottom of the radiator.

[85Ram50]

You're correct. The single pin connector is for the temp gauge; the two pin is for the computer. If there's no longer a computer, the two pin is now nothing more than a hole plug. You could use that for a fan thermo-switch, but keep in mind that it is before the thermostat. Typically the sensor switch is after the t-stat, either near the top or the bottom of the radiator.

Thank you. I wish I still had the thermostat housing that had the side hole in it. I forget what I did with it. I might go with that new thing I wired the fan in my Dakota with. A fitting in the hose from the thermostat to the radiator where you put the temperature grounding switch.