The later wheels need wheel spacers to get the tire away from the leaf and out into the wheel opening properly, and the bigger the tire, the more spacer you'll need up front. I'm axle swapped so I have to run '05-up offsets, basically the wheel will look about the same on any truck from '99-16 given similar ride height and tire size.
If you look closely, you can see the rear wheels look "sucked in" on the '99 axle. I have an '05 axle I just haven't gotten around to installing yet, that widens the rear track width a couple inches. I'm also looking into 18x9s with 4.5BS instead of the 5.95BS to change it up a bit.
The late offsets on an early truck are a pain in the ass. Two other important things to know, the lugs may be a different thread pitch than the later truck (mine were), and the wheel center caps can be a challenge requiring you to play mix-n-match, and the early caps look stupid on the late wheels.