I would think this is simple, someplace on the net I could find a nice thermal switch from an Accord or something that switches on at 195 and off at 175 but nope! Nothing out there anyplace other then use the Ford fan. After that you'd think a standard would be set for a relay and switch as well but it isn't... Anybody have any parts numbers or anything? I can spend $32 on one at summit but I know there has to be a $12 thermal switch out there that's do the job without some stupid brand name stamped on it. So anybody have in info on a thermal switch? Anybody have a low priced relay to mate it with? Thanks guys!