Thanks, guys. I'm gonna cut bigger holes in the lower grille block and reinstall it during my lunch hour and see what it does on the way home tonight.
It's amazing what you can learn with a little feedback. On my little excursion out of town last weekend, I couldn't figure out at first why my new little fan indicator LED was staying on. Then I realized that I had defrost selected.
Defrost=AC=fan running constantly. I knew that, just needed the little red LED for the dope-slap upside the head.