2wd vs 4wd ride height

[ornge58]

I'm looking at getting a 99 Chevy 1500 2wd and I'm just wondering what the difference is in ride height between a 2wd and 4wd- in reference to the distance between the fenders to the center of the wheels. I'm wondering what it would take to make the 2wd sit like a 4wd. Could anyone help me out with these measurements or your suggestions? (No need for a 4wd, I just like the stance, and its too good a deal on the truck to pass up.)