Heres some pics of a Conleys sheet metal intake(on the left) sitting next to a Hogans sheet metal intake(on the right)
According to what ive read about custom intakes,you want plenum volume to be roughly 1/2 of the engine size(example 3.8 liter engine=1.9 liter plenum volume),the longer the runners the better for tq,and you want the injector location to be a few inches away from the valve for atomization.
And its for sale on ebay if anyone wants to go REALLY fast on stock style heads
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WhiteStar