I've tried'm all.
The factory clutch-n-fan works well, and gives ya alittle more hp at high speed.
But a BIG flex fan cools better at idle and low speeds.
And i dont like all that wieght on the water pump. I believe thats why the bearings wear out.
Heres my favorite recipe.

Large two row core aluminum radiater.
Factory fan shroud.
Flexalite #1319(19-5/16) with a 1" spacer.
170* stat with two 1/8" holes.
Upper-n-lower baffles.
Many guys use a/c crank(8")-n-water pump(6-3/8) pulleys.
I dont have a/c, so use 7" crk/8" w/p for alittle more HP and less strain/pressure on the system.
Mine idles about 185-190* without any baffles.
Drops to 170-175 as soon as i floor it.