Hey dude. You should join the Louisville Hypermilers group. Do you know any others from Louisville on here? I'd like to do a real life meetup in the future.
I installed a grill block made of coroplast and 2 sided tape. it was really easy to do. I may have to rethink the 2 sided tape if it doesn't hold well, but so far so good. I will update as far as increased mpg.
So far, I have begun by changing driving style drastically, using some hypermiling techniques such as P&G and EOC. I have lightened my car of excess junk and removed my antenna. Nothing drastic yet. I have seen an improvement to 35mpg so far, not bad.