you can also pick up any Bosch relay locally, fusible link sold by single or bulk (U make) if you want,,,, it's very easy to do 6-8'' long. my thermostat switch is a napa one at 190 degrees napa #8750, screwed into the lower half of the thermostat housing. it's mlld cast iron, easy to drill and thread 1/4NPT. run your ground wire from it to both #85 posts on your relays. you can also keep a hand switch inside the cab, another option wired to ground, parallel circuit. just incase of a hot day.
but
have the radiator core rodded and cleaned.
Last edited by carolines truck; 12/29/2008 4:36 AM.