Hey ya'll, long time lurker and Comanche lover, may be getting close to pulling the trigger on a 91 4.0 2wd manual (I assume AX-15) but ultimately want to convert it to 4x4. I previously had a 00 WJ with the NP242 Selectrac TC and loved it. What am I looking at to convert this 91 over to not only 4x4 but specifically a 242? I ask because I've read conflicting info online. The general idea is to find a 23 spline 242 and go from there, right or wrong? Any suggestions or thoughts would be much appreciated not only on this but general what to look for potentials problems in any Comanche but especially a 91. Thanks!