If the swaybar is angled down it can affect the ride to some extent, but mainly it won't do it's job as far as sway. For a 3" rear drop you probably won't need adjustable trailing arms or panhard bar. The trailing arms are for centering the wheels front-to-rear in the fender wells and the panhard bar is for side-to side. The more you drop, the more the wheels will move towards the passenger side and forward. If your tires start rubbing or if they're off-center enough to bother you then you need to look into these items, otherwise don't bother. I have 26" wheels and the tires were rubbing a bit when cornering hard so I got a Spohn adjustable panhard bar to adjust the tires to the left about 3/8", just enough to stop the rubbing for the most part. If you don't have shock extenders though, that will affect ride quality since your shocks will be too far compressed. You can see the DJM one in 01ssreda4's pic above, in front of the spring on the right.