Re: 02 fummins 4x4 need help !!
Just leave the electric shift one in there. You'll save yourself a good bit of headache trying to make the linkage for a manual shift t-case work.
Im assuming the 5speed you have listed is an nv4500? If so, you'll need to fab a mount and bracket to run a manual shift t-case. In ford applications the linkage for the manual t-case bolts to the side of the ford transmission....obviously, the dodge trans won't have the same set-up. Leaving the electric shift transfer case in avoids this problem.
Since the truck was an auto before, take the auto trans linkage and sensor, put the shifter linkage in neutral and just zip tie it or secure it someway to the frame. This should meet the parameters you need for the electric shift t-case to work.
I'm away from my notes for the next few months, so if that doesn't work, reply back here and I'll try to remember anything I've forgotten.