even with the correct clutch housing adapter (which i'm not sure exists in SAE pattern)
and doing a GM style fixed-yoke tailshaft conversion the NV will still be 3"+ longer than the Spicer trans. you cannot make that 3" up in the jack-shaft.
so, basically the answer is 'no' because it won't physically fit without relocating the transfer.
what are the advantages? i see 2: reliability and OD. i trust my NV4500 much more than i trust the 60 year old Spicer. the OD ratio is 0.73. it isn't quite the 0.69 ratio of the kit, but a rebuilt NV4500 in the correct configuration can be had for the same amount of money as the 0.69 kit.
to make one fit:
- locate an SAE #3 clutch housing or make a custom engine adapter in the Dodge Cummins bolt pattern (plus custom flywheel to use Cummins clutch)
- relocate transfercase rearward
- build custom jackshaft
- convert to hydraulic clutch
- add custom clutch pedal
- make a new shifter
- cut a new hole in trans floor cover
obstacles relative to above:
- not sure if this exists or will be expensive
- PITA plus drive shaft mod expenses
- expensive (trust me on this one)
- not a problem
- PITA
- not a problem
- not a problem
overall, not worth it to gain a little bit of reliability without changing out the most unreliable part - the MF.