So glad I found this thread! So I have a 2012 1500 4x4 Express and just bought a 2018 Challenger 392. My plan is to pull the 392, replace it with a 426 forged stroker and put the 392 in my 1500. From the sound of it i would need to get my pcm retuned to match the 392, is that correct? Is there any information you can add to this??