Yes.
My 428 has an aluminium rad with a pair of puller fans in an aluminium shroud, RPM intake and a temp probe in the water crossover. I use a 180 deg switch. Running the fans after the engine is shut off didn't make that much sense to me as the water is not circulating, the probe/switch is in the water in the engine and the air is cooling the water in the rad.

I put in two relays on the rad support powered from the main alternator terminal block through two 30 amp breakers. That gives the fans a full 14.2 volts. The relays are controlled from a 12 volt ignition switch source [only hot when the switch is on]and the thermo switch in the manifold. When the thermo switch grounds [turns on] the relays supply 14.2 volts to the fans, when the key is turned off the relays open and the fans quit. A toggle switch is used if the thermo switch fails.