Alrighty, so I got the lower grill block on before my trip from Buffalo back to Albany, the pic is below (both sides look the same).
Now, with those two mods, and with some drafting, about 2-3 miles of EOCing, lots of pulse and glide. I was able to to follow a double trailer UPS truck for about 50-60 miles and he waived to me when he turned off it was great. So..... *Drumroll* what kind of gas mileage did all this get me you ask? 46.66mpg almost 10mpg better then the steady state 65mph cruise control run (granted it was different directions, better data to follow next week when I go to buffalo again).
So, that's my results so far.