I agree that if you don't have a shroud for it you should make one. it really helps a lot. That is assuming your fan clutch is healthy.
Also, when you make the fan shroud, think about airflow through the radiator. Too many times I see people bolt a flat piece of metal to the back of the radiator, cut a hole in it for the fan, weld a ring on and call it good. The air needs to be able to flow through the radiator, out the back, then get channeled to the middle where the fan ins in some sort of nice gentle fashion.