Electric fan Help

I have a 1992 MAZDA B 2600I, and im wanting to convert it to electric fans instead of the old belt driven fan. How ever i dont see a place for a temp sesnor on the water neck and i dont know much about how to install it, any help would be great along with pics and instruction. Also, any info on what fan that would be best used (either from another vehicle or parts store universal fans)!
Thanks

this is the truck by the way..