No one I have found has actually done this, I have been told its rumored that someone did but I have yet to locate the info.
As for the ECM tuning, that would take a discussion with Sean at HemiFever to see what he say, I have not sent a email to him yet as I am no where close to this actually happening and don't want to waste his time with trying to figure it out.
As for parts I am looking at using parts produced for a 2006 SRT-10. Trans and all. all the brake pedal assembly, clutch, bellhousing parts, but I'm assuming the flywheel will have to be modified. I am still gathering info between the two generations to find where the differences are and what will work and what wont.
The reason I am looking to the SRT-10 is that it is basically my truck in layout just different motor and trans so things like mounts and such will be custom but the pedals and stuff I mentioned should be the same or very similar. the key thing is the shifter location and it looks very similar to a R/T full center console in the 4th gens... this is about as far as I have gotten. I have found a SRT-10 part supplier that a member here pointed me to but I never heard back from then when I requested info on a parts list and prices to get a budget developed. so Im kinda in limbo at the moment