Not a ford guy so I have no idea, and have searched google like crazy and here. Just need to know if NP203's came behind NP435s or if they can be bolted up.

yes and yes.

Awsome thanks

I've never seen evidence that the 435 was offered with the 203 -- the fulltime case only came with the automatic transmission. But the bolt patterns are all the same, so they swap no matter what.

just needed to know if I could bolt my 203/205 doubler to it.

hmm you may have a point there, I know ive seen them mated together in a truck that "looked factory" but I guess on a 25 year old truck, who knows. but either way, they will go together.