I know this is a wicked old tread but for anyone reading it for help its all very misleading.
there was one guy who hit the nail on the head.
trying to put more air through the intake while keeping the stock throttle body is pointless. you may be able to get a little more(very little) but since your still naturally aspirated your engine wont be pulling in more air through the same throttle body. try forcing it with a ram air
also my 97 with the 4.0 has a round intake which stock, sucks in air from my fender over the wheel well... cold enough for me