what side of IA? there are a few tuners in Omaha, NE just across the river. One is C & S Motorsports in Omaha. Another is in Lincoln, NE called Dynosport Racing. In Kansas City there are a few places, one of which has an all wheel drive dyno, which dont really matter to us, but they drop the coin on that they might have an idea of what they are doing.
The C & S Motorsports one in Omaha seems decent heard good things from a few people and the guy that runs it seems cool. Im taking my car there sometime soon.