Where's that water pump setup come from? I have an engine driven fan on my car, but its low, and as you mentioned, the diameter is limited by the fact its low in the chassis... I have yet to actually drive the car, but I'm skeptical its gonna keep it cool, especially with no shroud and full (unlouvered) hood sides. I do like the idea of an engine driven fan over an ugly modern electric job... that raised water pump may be something i'm needed come next spring.