RB26HB

Alright, I am about to undertake a large project. I am looking for a Hardbody, and can find the 2wd's cheaper, but I need a 4wd. I was thinking of taking the 2wd, and swapping the control arms and spindles from a 4x4 over to the 2wd. Since I don't have 2 to looak at and figure it out, I figured I would check and see if anyone had an idea if I could do this, or if I have to buy a 4x4. Also is there a difference in the crossmember? Also on the 4X4's how far can you lower the front end by twisting the torsion bars?

Thanks in advance