I appreciate the concern, but I don't think that the structural integrity has really been compromised. I would venture to say that the strut bar provides more rigidity than was lost by the top of the radiator support. Of course...I could be wrong.
The top of the radiator support was pretty thin, and the bottom boxed part connecting the frame rails is still intact. That being said, I probably will reconnect the top of the frame support below the air box.
Thanks for all the ideas Vinny...I'm going to have to think about my options for a while. Right now I think that just getting air from in front of the radiator support without any scoops might be the best way to go. The air box has a pretty good angle to it (the front is a couple inches lower than the back), and it is open to a high pressure area of pre-radiator heated air.
I'm going to solicit input from blueovalZ (he modified his radiator support) and johnc (Z car and structure expert) in regards to this issue as well.