Run electric fans all the time?

I have Contour fans on the 26" rad keeping the 451 cool in my '72 Dart. But they do seem to interfere somewhat with the airflow at low speeds on the street. Since my thermostat is nominally 180, I have to use a 195/185 switch so the fans will turn off once they start (can't be below the stat temp). The switch is mounted in the upper hose a few inches from the elbow since it was mechanically inconvenient to put it in the water pump. My Autometer mechanical gauge (in the water pump) shows the fans coming on at 198 and off at 192 which is acceptable. (If I lock the fans on while idling and stationary, temp will fall to t-stat minimum of 182).

I'm wondering if there would be any value to running the fans on a low speed whenever the engine is running, and the temp switch control them for full speed. That will keep the idle temp lower, and also help the airflow while driving. It's a simple circuit requiring one relay and a big-*** 0.5 - 1 ohm resistor (maybe the fan-cooled nichrome unit that came with it), both of which I have.

Thoughts? :)