There were photos somewhere of someone who had drilled big holes in the non-functional hood scoop of an older model 4R, and attached flex tubing to each of them and ran them to the airbox... will try to find the link...
The downside: When it rains/snows, not only will you induct air, you'll induct moisture too...
I haven't done this on my 4R since the stock system seems to draw air from the wheel well anyhow, but on other vehicles I've taken 2-3" dia. flex tubing and made a "poor man's ram air induction" by routing the open tube from the lower front air dam to the airbox or to where the stock airbox pulls in air in order to feed it cooler outside air at higher speeds. It seemed to make a small difference in performance, but that was probably offset by hitting the gas more often and consuming more fuel...