"If the intent is to prevent aerodynamic advantages, I question whether or not horizontal paneling mounted that low on a car offers any kind of advantage."
That's right -- you and I don't know. And if it did, would it do it on every style of roadster. Why not mount it 30" above the ground, tie it into the headrest fairing, put a couple of 1/4" holes in it, make sure your truck has the bumper the same height (a 4WD would do), and cover all the rest of the decklid. A hell of a pushbar, and functional, too.
Nathan, it's getting harder and harder to identify a roadster. This crap has gone too far. A little slip here and another here and pretty soon it's the norm. You, too, have seen it happen.
Give me a call and I'll tell you how I really feel. About flush doors, flush coupe' pillars, flush gas tank lids, etc.
And -- Stan Back