The good news is, the NP435 is a great and sought-after trans for the 4WD crowd. There's a multitude of adapters from places like Novak or Advance Adapters for various transfer cases. So if I were you, I'd package up the flywheel, clutch, PP and bellhousing w the trans and sell it.
What year truck? I need a 76-77 Adventurer volt/vacuum gauge with the early woodgrain bezel.