NP435 were a 4spd used in older Dodges, '70s and '80s they have a very low first gear something like 6:1. First gear is not syncronized.
NV4500 is a 5 spd with with a low 1st. Currently one of the best swaps out there, lots of $$$$$.
SM465 were used in Chevs.
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'89 XJ 4" lift, Warn Combo mount and 9.5ti!
31s, 4.10s and rear lockright!
That's enough(for now!)