On another note.... many ppl convert to the half-sized radiator, to fit it all in...
my friend's GSR-T has the full sized radiator still, and he used a slim-line radiator fan, (the company name is escaping me at the moment.) but that would be the best bet, Imo, because the double 10-bladed fans are much more efficient than the stock four-bladed fans... when his car idles, they come on for like 20sec, and then shut off again, because that's all it takes.

If anyone else thinks of the name before I do, post it, if not, i'll be back when I remember it.