Electric Fan Controller?
Ron francis makes this one but the temp probe isn't a screw in, it is like a wire with a hole in the end that you put a bolt through and tighten down against the engine.... To me this seems like it wouldn't work....
http://www.summitracing.com/parts/rfw-ar88/overview/
Then there is this one that needs the probe bought separate. Seems high end?
http://www.summitracing.com/parts/da...2750/overview/
And then there is this?
http://www.summitracing.com/parts/der-16789/overview/
Compressor Works/Electric Fan Thermostat (733653) | 1977 Ford F100 1/2 ton P/U 2WD 8 Cylinders G 5.0L 2BL OHV | AutoZone.com
Maybe it's tacky.
I started out with some generic 70A relays that I wasn't really happy with, but on a scrounging trip to the junk yard, I found a cool little setup out of (I think) a Durango that has a bracket, two relays, and the plugs for them, all weather sealed. Looks like it belongs there and ran one of the two speed Tarus fans for years.
Just another option...




