Yesterday I had an Aux fuel tank installed at Auto World here in Great Falls. They just completed a repower on a 1997 3500 Chevy with a 12V Cummins and NV4500, in the box sat the 6.5 & 4L80 as a unit. I have been keeping an eye on it for a guy out of Colorado. Nice set up, Cowl induction hood, first class install look like it came with the truck. Best part is he has good riding truck rather than a rough old Dodge.
The other is a 1988 1500 Suburban set on a Dodge One ton running gear.
It has a 2005 325hp Cummins in it. Again a first class fabrication. This place has been doing repowers since 1989 and they had had one in the shop since.
Here's a link if you want to check it out, look under Cummins Repower: