engine harness for $$$

Steve White Motors sells/installs/tunes SC kits, so the OEM PCM might be an option. Might be worth reaching out to them. At the same time, might just be easier to go aftermarket.

Is the 6.4 built? Or are you limiting the boost? The 6.4 pistons are pretty fragile when boost is involved. Not that it can’t be done, but (as I understand it) tune is super important and boost is pretty limited.
I have heard of the results of too much boost especially with the OEM compression and the pistons w/ high ring glands....not good.

The 6.4 has the Extreme 10.1 / 1 drop in kit, features (.10 over) lower compression pistons and H beam rods. Bullet cam (w/ the new Mopar roller lifters) almost identical to the DSR. Timing cover / water pump from the Supercharged 6.2 to run the independent, wider supercharger belt. Butch is thinking around 12 lbs of boost.

thanks for your input