I am going to make my vote for some sort of Toyota T-case adapter to 4l30e.

Along with mass produced Toy CV to isuzu T-case output flanges.

I personally should start with the Tera t-case gears and go from there, I can't talk until I try, but I also ain't got no money after my axle swap.

Also I think it shouldnt be hard to make up some sort of complete SAS kit with measurements and stuff so that the more average backyard DIY kinda guy can pull off an SAS. That is a lot of what has done it for all-pro measurements and good instructions have allowed a lot of SASes to be born. While you are at this you might as well see if you can't pull off a linked coil suspension kit as well.

I would like wider amigo front fenders. And roll cages would be cool. What about DIY exo/endo skeleton cages?

A cool exo makes it so you don't have to put on gay garden edging to pass inspection.