You can lower it to stock height or a bit lower, but thats about it. If you really want a lowered truck your going to need to convert this one to 2wd or sell it off and get what you want.
If you got a good deal on a solid truck I suggest you keep it. I love lowered trucks, but a clean lifted stepper is cool too. Find some pics of lifted trucks and see what you think. You might decide that you like that look too.
Its ok to like both styles...