Sounds like a beast. Those engines have roller cams, timing chains, iron intake mans and run a long time. probably 355 gears. The granny in the tranny in low transfer case gear will be just strong as you'll need for anything. I assume it's solid as you are in Wash.? Lucky you, and maybe the roof will hold up for you(rust). I would consider putting manual front hubs on it and lock the axle disconnect fork somehow.