I have a Flex-O-Lite fan on my 65' Chevy Truck (every-day-driver), and no problems so far. If you get one too small though... you will have trouble keeping it cool... I dont notice mine running untill I kill the engine or roll the hood over, so its not too bad. If it's a daily driver and you hit traffic, or spend much time cruising at near idle low RPM's/ speeds, you may benefit from having one. If not, I'd leave the clutch fan in. Save the dough... Also... If the clutch fan is keeping it cool enough, I'd leave it as is.

Gary