I have done alot of tuning, used to contract for GMPP. The hypertech and similar products just are not a great solution for changing engine paramaters. They will only experience minor gains. However ECm remapping usually results in the best gains and economy improvement. A "good" tuner can run the AF on the lean side at low MAP, and get 2-4 mpg gains along with even adding tables for multi octane maps. Brian at PCM for less may be able to help but I am not familiar with any mopar software nor with any tuners that have experience with the new 3.8L. I am sure it would be a great avenue for a vendor to develop some new business.