Another 4wd conversion

Okay so I need some assistance, I have a 1998 single cab 2wd frontier with the little 4cyl 5speed , I already cranked the torsions, and have it Sitting on 33s and 12 wides, I have ran that setup for about 4 months now, and I am getting tired of not having 4wd and getting stuck, I am not wanting to do your general conversion, as it is not my dd, I have some Dana 44 axles that are setup for leaf springs and I would like know what you guys would recommend for transfer case options, I’d like to keep it a 5 speed but I am not against a transmission swap, I just don’t know what’s out there, I’ve been trying to so reasearch and have come up empty on a lot of it