In the past I did a grille block over only the grille - and then added two blocks for the "tow hook holes". I pondered removing the tow hooks, so the block could be "complete", but decided not to, which required cutting slots in the block to allow for the part of the hooks that protrude.
However, this time, I noticed that from the little "lip" on the bumper (a natural place to "seat" the edge of the cardboard) to the chrome top of the grille would make a really nice slope, complimenting the overall shape of the front end. Then I tried to extend that to in front of the headlights to get the shape all the way across. The plexiglass wouldn't bend quite enough to follow the curve at the edge, and although I'd made grandiose plans to heat it in the oven over a form to bend it, that never happened. So instead, I just slid it under the center cardboard piece until the outside edges were "close" to where they needed to be & finished it off with 2" wide clear packing tape to the fronts of the fenders. I was pleasantly surprised that it turned out a little "nicer" than I was afraid it would.
The last thing I tried along with the fender skirts was a piece between the bottom of the front bumper and the skid plate under the engine. It was when I had that in place that the thing really overheated bad. Well, it overheated before, so that's where the hole in the middle came from. I think I was just too successful at completely sealing off all possible air intakes to the radiator. In the future, I think maybe leave the tow hook openings open, and see how that works. From what I'm reading here from "aerohead" and others (I think), the lower "stagnation points" sound like a better place to draw radiator air from, anyway.
After re-reading your post, Slow_s10, maybe you inadvertently found the "trick" - that is, leaving the tow hook slots open.
One thing I did do, after being dismayed at how much my mileage dropped when I took the stuff off, was put ONE of the plexiglass pieces in front of the grille right in the middle. It's not big enough to cover the whole grille, let alone the headlights, but it's SOMETHING, at least. And actually, I kinda like the way it looks. ... you can see the stock grille behind it, etc. Maybe a much wider piece of plexiglass, cut to fit, over the whole front might be something to try in the future.....
