Temp switch

[XtechX]

I need some help selecting a temperature switch set up for my truck. I'm installing a *180 t stat in it, so I'm thinking I need a switch that will turn the fan on at about 195-200 and off at about 185. I can't seem to find one at Napa, does anyone have a part number for a switch that will work for me?
All the ones that Napa shows in there books, don't seem to show their statistics, just that it turns the fan on at say..*213. So it's hard to pick the right one. They don't seem to have ones that run in the range I want to run at. (They might, but they haven't found one in there books yet). The switch doesnt have to be a Napa part, so if anyone has a part number from another source, that would be great too. I've never tried to run an electric fan before so any suggestion or recomendations on getting this to work would also be helpful. Such as switch placement, wiring diagrams, guage sensor placement etc. Details==> (350 sbc .040 over with mild cam, flex-a-lite single fan attached to a stock radiator 1965 chevy lwb.)...Thanks