I applaud you in questioning the norm. How else are things innovated when you dont question WHY something is done the way it usually is. Whether its been done that way by means of thousands of hours of research by engineers or whether its done that way because a bunch of car guys seem to think it would work best its good that your doing the thinking.
I am interested in actually testing the cooling when I hook mine up. I have temp probes and access to a meter to graph the cooling. Shouldnt be too hard to test both different potential tap-in spots. Ill post here my findings- wont be for a while now as the car is under the knife.