If your factory calibration or current tuning software just won't allow you to do what you need, custom PCM calibrations and modifications are the way to go. Most changes can be completed and allow you to continue working with your custom tuning software as well. The possibilities are endless on what can be done, such as full race custom configured calibrations, Turbo 400 specific conversion PCM's unlocked for tuner of your choice, 2011 and up GPEC controllers can be configured for 6.1 based engine transplants, even custom calibrations can be made to put your 5.7L VVT HEMI in your 70's Cuda. If you are in need of custom PCM work please email us at tuning@hhpracing.com for more information or for a more complete pricing estimate on the PCM work you need.