CrusaderTanker

I have a 4x4 wd21 pathy that I am looking to change over to a rear wheel only. The frame is rotted and im looking to lighten the load on what I have left and tube the rest of the rotted areas. Seems no one in my area is willing to do frame repair so tube bracing it is. From that stand point I think there is a 2wd variant of the pathfinder however I can not seem to find either the hubs that will fit my truck or even a build of anyone who has pitched their 4 wheel drive before. May be stupid but its the goal and plan to build this truck in a different speed and possibly turn it into something fantastic. Or fail tragically either way I am going to send it. Any ideas on what I need to look for or parts lists and where to find them? Thanks in advance both to the trolls and those that help.