Yes, very very true- many people ignore what happens to the air after the inlet- for example, once it's ducted to the radiator or cooler, what then? What is the exit plan? You still have the same air mass as you did before the inlet, so the outlet is just as important. A waterfall style radiator exit is the most ideal situation. If you are willing to cut out the front/top radiator support, lean the rad forward, weld in a support, and make a "waterfall duct" up to the hood, get a small fan or two, some sheet metal fab, you can ensure the rad air gets ducted out of the hood- all GT3 and GTLM cars do this. I haven't done the lean forward bit myself (yet), but i moved the water and PS tanks to where the battery used to be located, and re-located the battery to the passenger compartment. Still not much room with the intake elbow and stock radiator position for a waterfall exit, so the next step is cutting and welding. As for an oil cooler, you want to place that in front of the radiator if possible, not behind. I personally use an RX-7 oil cooler- easy to get on ebay, and super low profile but really thick and handles alot of cooling load- been running on my 4.6 3v for 4 years with oil temps never above 260, even in very hot ambient conditions and 8 hour long endurance races.