Yes, you can change your cooling fan from a clutch fan to an electric fan. Some advantages to this swap are generally, an increase in horsepower. This is due to the reduction of drag imposed on an engine by a engine driven component. In this case the fan clutch and blade assy.
Another might be an increase in the cfm of air moving through the radiator and over the engine, not to mention an increase in one's ability to better control the overall operation of the cooling fan and hence the cfm. This would of course depend on the installation.
By this I mean, if you just replace the oem fan assy. with an electric model of equal power and cfm, you might be loosing the ability to vary the total fan output as a clutch fans' whole purpose is to apply maximum cfm of air movement when it is most needed. Conversly at the times when less than max air movement is required the clutch fan is designed to lessen the drag on the engine when less fan is needed.
If I haven't lost you yet here are some of your options. You can install a thermo-switch to turn your electric fan on at a certain temperature. This would be determined by mfg. sug. "normal operating temp." and/or "thermostat opening temp."
Or you could wire your fan to your ingnition switch so as to have it running whenever the key is in the run position.
Finally you could wire it to a switch somewhere conveniently located within reach in the pasenger comp. With this set-up you have total control of when it is on and when it is not.
I don't advise this last option as, should you at anytime fail to switch it on and the engine is running it doesn't take long to overheat and well that can get catastrophic. Anytime you can avoid the human equation you will have a better chance for success.
The best bet is a therm-switch. Just make sure you always wire any high amp accessory such as a cooling fan through a relay. Also I would suggest not skimping on quality components here. Go with Dorman, Flex-a-lite or Draw tite. Somebody who has a good number of years in the cooling field. No-name imports will cost you hundreds more than the proven specialists everytime.
Buying a 16", Bi-directional, multi blade fan for $120.00 is a great investment, provided it installed with top quality, switches, relays and mounting hardware, and provided all is installed properly.
On the other hand a $200.00 fan is worthless if the $2.00 switch used to power it is burned up. This usually happens unbenounced to the driver until the bells and whistles of an overheating engine begin to sound. By then it is often tooo late.
God Luck and I hope this helps!!!