I have installed a 1965 327 from a chevelle that had been sitting in a barn for 20 years, into a 70 Nova that originally had a 6 cylinder. Somebody cut the temp sending unit plug off. My question is does the Nova temp sending unit plug have two wires for two prongs or two wires for one prong? My wiring diagram shows two wires for the plug, and the unit in on the engine has one prong. Hope I haven't confused anybody because I am not sure myself now after reading my own post again.