nbleak21, Thanks for the reply. I thought I already responded to this a while ago. She thinks I am a little crazy at times but tolerates it most the time.
I can't believe this thread is already over one month old. This car now has a 5 mile round trip commute for the near future but will see a number of weekend highway trips.
The grill blocks seem to have helped a bit although not a-b-a tested. I just pulled the fuse for the AC in the instrument panel thanks to Neil's suggestion and it has made a difference in the fuel consumption with defrost on. Thanks Neil!
Is there a way to determine the expected fuel economy effect of a kammback to the 30% mark of the template. I think just from the tail lights up and expect it to be about 17" in length total. Picture is from the streamlining template thread.