95 k3500 cummins swap help

Im want to take the ol 6.5 out of my truck and add a cummins but im kinda at a snag i ready dont know what the best trans. and transfer case combo will be. In the truck now is a 4l80e and a bw 4401 transfer case both are fine but im told the 4l80e wont last with a cummins so im thinking of going to a nv4500. Now the questions start will a chevy nv4500 work if i swap the input shaft? will a chevy nv4500 fit my transfer case that i have? It seems like not very many people can answer this