Nice man, I wish I had the balls to do something like that. LOL So how did you do the watts-link? I've seen kits where they bolt on to the differential cover plate, but have never seen one like that before. Gives me ideas................
The Watts-link is the way to go because of what TS6034 mentioned. A panhard bar would work but you have to set it up exactly right. The bar allows the rear end to shift slightly during compression/rebound. A spring suspension may not notice this at all, depending on how close to the wheelwells you are running. With a bagged truck, the suspension can have a travel of 6+" and that much of a change would be noticable w/o the watt-link.
James