The AMG engine is built to extremely tight tolerances. I do not know if you could just drop the AMG pistons in the NA engine as one example. Even if you can, and you can figure out the issues you will have with the ECU, BCM, etc. Do you plan on upgrading the suspension and braking components to SRT specifications? I applaud you for taking this on, and wish you the best of luck. There are certainly enough talent in this forum to get you through the rough spots, which you can be certain there will be many. Just don't loose sight of the fact that the engine alone does not make an SRT-6.