Thats a good idea and is worth looking more into. Too bad the thermostat is at the bottom of the engine. Its almost worth spending $600 on a bigger radiator just to not deal with pulling the engine apart.
Also, the torqflo fan clutch works very well at cooling the engine. It makes the engine sound like a semi (all fan sound) and pulls a noticable amount of power from the engine. I couldn't handle the sound after a couple months and replaced it with a another brand.