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?