As long as the fan is on there pushing the air through, it makes no matter what method you used to put it on there.
The pump I posted I believe has 14ft of head or some close number. Granted it's not the 21 feet that you get with the Iwakis, but it is still powerful. When someone refers to head, it is the measurement of how far the pump could shoot water straight up in the air, in case you didnt know.
As far as mounting the fans on that thing, just wrap some wire around the fans and the rad and it will put it right on there. Anyway you see fit, but i would get a shroud as they also control the direction of the air, thus improving overall cooling performance of the radiator.