I have an IE radiator with an ac condenser and pusher fan that works There is not enough room for the stock fan on the water pump without hitting the radiator, so I went to this set up
IE Radiator AC condenser mounted directly to the radiator then, as big a high volume pusher fan as you can fit in mounted directly on the condenser. Rob Siegel's advise is to get a fan that will suck dogs off the sidewalk. Seriously research a 12 inch - I think - with the highest volume air flow you can find . Hint it's not the IE fan
The fan is triggered by the temp switch set up sold by IE.
Add a relay for this motor if it's not provided
My car runs at the mid point of the heat gauge, but when stopped at a long light, it will reach three quarters then the fan turns on and holds at three quarters until I get moving again when the temp goes back down and the fan shuts off.
In another non AC car I installed a fan, switched by a light switch in the fog light location, just to have a stock fan plus an electric pusher You could do the same to have a manual on operation in addition to the temp switch
By the way, be sure to put the fan in first while the radiator it out Just lay it in the front nose loose until the radiator and condenser are in place. Just use the Nylon ties often sold for trans coolers to sandwich the parts directly together. It helps to have three hands for this , Get a helper for a total of four hands to do it right
Best Regards