I need to know what thermal sensor switch i need to get to run electric fans. I'm still learning on this stuff. I already know i got to get measurements for electric fans to make sure they will fit and make sure they got shrouds. I don't want to straight wire the fans or run them on a kill switch.

 

Welcome to ZDriver!

I would use this in the thermostat to radiator hose:
Flex-a-lite Inline Radiator Hose Temperature Sensor Adapter

Many Saab's and Volvo's use a similar one if you want to hit the junkyard for a "cheap" solution.



Another example:

by https://www.flickr.com/photos/mjraudio/, on Flickr