Electric Fan ?

I've read several posts on using a electric fan to help cooling issues. They all seem to lean towards the use of a two speed fan off a early 90's Tarus, and a hi-output alternator (90amp) also off a early 90's Tarus. Looking thru the local Pick&Pull today I found what appeared to be three different fan blades, 5, 8 & 10, and the alternators I had no idea how to distinguish if in-fact it was a hi output. Do the ones I am looking for have a Ford part no or a identifiable markings or character ?

The electric fan I am using is from a Taurus wagon that had a 3.8L with A/C. As for the Alternator from that same wagon...not sure what size it was. This fan fits the 240 radiator nicely with minor modifying of the fan shroud. Trimmed down to fit inside the cores. It took me 10 minits or so to make it fit nice. It also covers about 90 to 95% of the rad. ...And I figured out why the pics were not working...DOH!!!!

Thanks for the picture's that cleared up a lot for me.

Bringing this old thread to the top. Did it substantially affect the cooling of the van? I imagine it also freed up some power from the engine cause it didn't have to drive the fan.

So far it works really well keeping a 350sbc at around 185 to 190 degrees. I drove the van into town and it ran very well. I also have a trans cooler with electric fan as well and no squealing on the alternator belt. Eventually I would like to run a dual pulley system for alt belts...but so far so good. I am very happy with this set up. I should also add that the radiator is a NEW 3 core, which is KEY to helping keep these old girls cool.

Ive got one of the 2 speed volvo fan controls, I'm going to mount a 2 speed VW temp switch in the lower radiator tank to control it and a 2 speed fan.