Im most likely wishing more then anything on the 35/5. A few things I have read about are much easier and some what cheaper.
Cold air intake said to be good for a few extra horses
Full synthetic oil for a hp or two
Throttle body and spacer? (am the most unsure to this one. Would guess more hp but equally less mpg.
And like you suggested, a bigger exhaust.
New chip (same as new ECM?) Again, dont know much about this one either.
To be realistic, if I could get 20/2 Id still be happy. And as you said its the aerodynamics thats the killer and I have no intention of flatting out the front end
ill just have to settle with some stuff I can do... To bad that tornado air thing and the 75hp chips are bogus. Its amazing what kinda crap you can come across looking for better mpg