Hi Andy,
My '03 has always had a rake but I actually liked it because as you load up the back, it comes down. I like that better then starting out level and dragging your ass end when it's loaded up or have a trailer hanging off the back, but that's just my pref. For my gen, maybe later as well, the rear half shafts come thru the frame, so that limits how much one can lift the back end. I'm guessing the "leveling" kits are popular because it allows 35's upfront where a bit more lift is needed to avoid too much rubbing when turning. Even with the leveling kit, mine still has a bit of a rake so I'm happy

.