Marlin,
The gill removal is interesting, but I doubt if any drag reduction is realized. The short profile scoops some install in place of the 1/4 windows have been shown to fail to grab any real air unless they are 6" to 8" out from the body, which tells me there isn't much air flowing close enough to the body to cause a gill-drag situation. As for the hood, it appears to be the same as a unit I have seen which is made of fiberglass and yes, it is just a depression, not a grill for air movement.
Larry
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