Can anyone out there help me?

I live in northern Indiana, South Bend area, and I'm looking for a mechanic I can trust to work on my x-fire. I have an '04 that is totally stock with 56k miles on it. It runs good once it get going but acceleration from a stop it pitiful. This car WILL NOT turn the tires over! I love the car but would probably love it more if it had a better take off! Does anyone know of a shop that works on crossfires in my area that knows what they are doing? I went to an independent shop that "specializes" in German inmports and they said they don't work on Chryslers! Help!!!