For the front you can crank the torsion bars to drop it.. will ride a little rougher but it's the most common (and free)
http://www.truckperformance.com has great pricing on DJM/Belltech spindles though.. they'd maintain ride quality and not cause camber problems. Also, spindles would help you later down the road if wanting to lay frame on larger wheels.
For the rear, simple angled drop blocks.. and you could remove a leaf even..