Heres a few pix of my mirror block off plates and upper grill block off plate.
They were made out of a nice aluminum diamond plate sheet I had laying around from a dune buggy project. I know its not a completely smooth surface but its what I had and it looks blingin
Also attached is a pic of my vacuum gauge and its custom mounting system
Its also my very best half tank @ 300 miles and it calculated out to just about 48 mpg