You'll need a custom remap that will require running the car on a dyno under different load conditions... Don't expect to pay anything less than $1,500 to get it done right... The OEM map will not have the latitude to handle the boost, I would start looking into installing the fueling / timing maps from the SRT6 and adjusting from there...

Either way, you'll be hard pressed to find someone with the expertise and resources to be able to do this job for you...

The only people I have found that can do this type of custom remap are Bosch Motorsports ECU techs. And even they don't have access to the OEM programs, so everything must be programmed from scratch...