Looking at a 1989 2500 4x4 burb with a manual trans. It is behind a locked gate so I can only see it from 20ft or a couple of pictures. I may need to put in an offer without getting any closer. I believe it to be all stock. 3/4 ton, so semi float 14b. It has a V8, should be a TBI350 in that year. Manual, so must be a SM465. What transfer case is in it? NP208 or a NP241?