[bouncytruck]

Your going to need to get the adapter for the NP203. I believe the output shafts should be the same. Advance Adapters sells them but if you can get the original, it will be cheaper. My '69 has a NP203 in it. The engine & tranny are also from a later model truck so I'm not sure if it is a direct bolt up. Get the cross member and the rods that connect the t-case to the engine too! Grim Reaper is the resident expert on 203 t-cases.