I did talk to Jerry at Tapped performance about the tuning aspect of this. The 6.4 manual combo was offered on trucks in canada and mexico so the factory operating system already exists. It should be as simple and taking the pcm, unlocking it, and then uploading the new factory tune. Im not going to add anything else to it for now, but he also assured me that when the time came, i could do regular tuning for power options. The 4th gen trucks have everything already set up for both automatics and manuals, compared to to the cummins guys swapping a 68rfe to a g56, the only differences should be the bell housing/ clutch setup and the flashing of the pcm. I will also have to use the 271 transfer case but that should be easy considering i already have the bw 47 manual transfer case. the template for the holes in the floor for both that and the shifter are already stamped. only thing i havent completely figured out is the driveshafts. for the 68rfe guys going to g56, they end up shortening the rear drive shaft and lengthening the front by 1.75 inches. but driveshafts are pretty easy to take to the shop and have done so ill probably try it out with mine first and adjust as neccesary.