You'll be fine with just a bodylift. 3" and you can easily fit 33's under it. About $150-200 for your truck's bodylift.
The other option is, imo, doing it the right way, is a suspension lift. RCD 5" kit or the Superlift 4" kit. Those also are perfect with 33's. Prices are a bit more.....$1500 for the Superlift, $2200-2500 for the RCD. The RCD ditches the torsion bars, and replaces them with Coil-overs.