Why the NP205? You do hardcore 4x4? I had an NP205 in my 89 for a while and swapped it back for a 1356. It sucked to use like a typical truck on snow and ice. And it was loud.
Now other than drive shafts, the 1356 and NP205 swapped on the back of the transmissions easy. ZF-5 and T-19...well a US gear overdrive actually.