EFI -3G hemi

I have a truck PCM sitting in my garage but I was told that if I'm using a 727 then the PCM needed to be a 2005 ram 2500 manual trans pcm, is this correct? If not how can I use what I currently have? Do I buy:$1000 for harness from Plumbfloored and a $ 125 for pedal for the drive by wire? then I can use the diablo CRM to tune out the TCM so I can run my 727?