When did they start making the Pre-runner style 2wd?
The first generation Taco had a Pre-Runner SR5 version, it was a 3.4 X-cab w/a small lift, larger tires(taller gears I believe), and an electric locking differential.
I think most of the stuff is already there if you want IFS up front.....
Nope, different IFS design, the 2wd upper control arms are 8" wide whereas the 4x4 are 12", 2wd torsion bars are lower mount whereas 4x4 are upper, etc., it would be a lot of work, an SAS would be easier.