I have done the swap from a N/A to the srt6 engine and if you don't have a complete donor car then it is not worth doing. All the modules need to be used or hack the ECU from the srt6 and reset the vin as well as some wiring to allow for the S/C pump and fuse as well as some other misc wiring mods. Also the rear end and transmission from the donor car needs to be used. It took me 3 months to do all the wiring using the harness from the donor car and all suspension parts incl the brakes. Basically move most of the parts that make an srt6 over to the N/A body.

It can be done and is an exciting wolf in sheep's clothing when you are done. Nobody should attempt this swap without some good knowledge of electrical systems and mechanical skills. If you do attempt this I can help with lessons learned and save some time and money with pointers if you need it.
Robert