I like the idea.
The 249 was available in two versions, both with viscus couplers like the Eagle. The early (1993–1996) version had no differential lock. The later version (1996 and beyond) had a rear torque bias, but included a provision to lock the center differential.
The only two things you need to look at are the rear output, I don't know if it's a slip yoke or a fixed like ours; and the speedometer output. Both can be overcome, but if you need to change the rear yoke you'll need a slip yoke eliminator or have a Jeep drive shaft re-sized to fit.
On later NV/NP cases digit one is 1 for four wheel drive only, 2 for two wheel drive available. Digit two is the case series, and digit three indicates differential type, 1 for no differential, 2 for open, 3 for electric locked, 4 and 5 both indicate an asymmetrical torque split planetary gear and gear drive, 6 means an electronic clutch pack, 7 means a hydraulic clutch pack, and 9 means a viscous coupler.