2WD to 4WD hump

[BigBlocksRule]

I just scored a straight '91 Suburban for one of my next projects. It's 2WD and I want to convert it to 4WD. I understand I can do a 2" body lift to clear the transfer case, but is it possible to swap the tall center hump or is that a major undertaking? I'm fine with a body lift, but if I can get away without it and just go with 4" of suspension lift, it will be something to consider before I start work. This one has a nice, straight frame and I have all the matching 4WD stuff to use, just need the hangers in front and add a crossbrace and I'm good to go. I have a '77 K-5 to use for reference.

I have a couple of kids as does my GF, they like camping and skiing and this will be the perfect rig to let 'em use. I'm not a fan of camping that much (my idea of "roughing it" is a small microwave and TV ). If I'm sleeping in the woods, it'll be in the back of the 'burb. When a bear shows up, close the tailgate and drive off, come back and get what he left tomorrow.