Hey Frenchy, I saw you other post where you said you found it at an out of town wedding. I thought to myself: "I wonder if he brought the trailer to the wedding, *just in case*!" that would be awesome!
I agree that this likely has a NP203 Transfer case with a Doug Nash Part time conversion kit installed.
I looked at the pic of your build sheet but did not see any reference to what kind of FWD you have. What does your 4WD Lever look like? That is usually the easiest way to tell, provided it has the original knob on it.
NP205 (factory part time four wheel drive, with locking hubs) have selector knobs that look like this:
4-L
N
2-H
4-H
http://www.fourwheeler.com/features/...potters-guide/
NP203
Identify: Cast-iron housing
Low-Range: 1.96
Lubricant: 85W-90 gear oil
Notes: Many of these full-time transfer cases have been converted to part-time with manually locking front hubs using a Doug Nash-designed kit, now sold by MileMarker. Depending on OE application, input spline counts are 10, 28, and 32.