it's my understanding that in order to have a cowl hood actually work you have to have a force of air pushing into the cowl hood scoop.
looking at the windshield in the pics...
(and i know this to be true of all the 4th gens, its been discussed to death...trust me.)
...i would think that the windshield is too slanted to create the proper airflow to make a cowl hood functional.
just something to think about...