Running Hot When Not Moving

[billybronco1]

My ford runs at about 190 - 200 degrees on these hot days as long as I'm moving. I'm running 180 degree thermostats (Subaru) with a little bypass leakage. When I stop at a light for more that a minute once up to temp she quickly red lines, has not boiled over but I'm sure it would if I sat too long. Has anyone had experience installing an electric fan in front of the radiator, do they make six volt fans? Do you think that would help?