Anyone using stock ECM and harness?

Hey everyone. I'm in the planning stages of my gen 3 hemi swap. I'm planning to buy a complete running car for the swap. I'm looking at an 05 300C. I'd like to use as much out of the donor car as possible; engine, transmission, harness w/ ECM, shifter, airbox and maybe even gauge cluster.
I'm concerned about the ECM needing an input from the other modules not used like ABS. I couldn't find a swap like this in my searching. Does anyone have any input?

I'm using the stock ECM and all of the stock modules. However, I'm going to use Hotwire's harness. I'm running a '13 6.4L.