Not your original problem, but how about $29 for an adjustable fan controller w/ relay? Hayden 3651 on
www.rockauto.com. Same PN is $45 at Summit. I just ordered 2 (slowly adding fans to all my cars). Hope I didn't deplete their stock. I ran across it when browsing for my 64 Valiant 225. It has a sensor that screws into a 1/8" NPT port instead of the in-fin sensors of other kits. Before this, I was looking for just a temp switch for a roll-my-own design, but ~$30 on ebay for a 190 F one.
