Polk Performance. They are in Little Rock and do great work. I recommend them highly. They'll work on anything, and end up with a great product. Just try to keep a leash on them, cause they like to go big. You know, more is better.
They have a dyno on site, too, which is handy.
Also, Dyno & Performance in Fort Smith has already done one KA-T that I know of. The kid drove it in on Saturday morning, and by Saturday night they were at the track with a 240whp setup. The owner is a very cool guy and just loves working on cars. Last time I was there he had a '32 Ford roadster on one lift, and a '99 Civic turbo job on the dyno, with my 240 in between.
PS: I'm in Fayetteville.