Hemidude

So working on my cummins swap into my 2000 gmc 2500 4x4. I had to shorten rear driveshaft, that's done. Now for front driveshaft. Has stock gm front diff but mateing up to 47RH auto with a 241DHD transfer case. Driveshaft needs to be slip shaft, 40.5 inches center to center of u-joints. Looks like 1330 u-joints. Anyone do this? Any help would be great.

Did my question not get posted in the right place? Did I offend everyone saying I did a Cummins swap into a GM? Maybe no one here has the knowledge to help? Thanks to this forum anyway.

Newbe here. If i'm in wrong fourm, pls help with link to right area. TIA 1999 GM 2500 4x4 auto,crew, short box, 12 valve cummins swap with dodge 47rh auto. Need ideas on a shift cable from colum shift to trans. Cable comes out floor under drivers seat. Won't work with dodge 47rh trans. Anyone done a auto conversion on one of these?