Im using a 2004 Ram Manual trans computer also. I had mine flashed by B & G . I little hard to get a hold of but seems to work great. By the way it will start and run with a factory flash. I ran mine for a month like that with no problems. It just runs a lot stronger with a custom tune.
69 Barracuda
70 Cuda
70 Cuda
70 Cuda Conv.
70 T/A Challenger
70 Sport Fury GT
71 Demon 5.7 Hemi
72 Demon