The Bilstein 6112s I've been waiting for came in this week and I put them on the truck today. Gotta say, this is the way to go. I had a Readylift 1.75" kit on it and was only using the top spacer, not the one under the shock, and my truck was perfectly level. Removed the spacers and now with the Bilsteins set on the tallest notch the truck is at exactly the same height and still perfectly level. So now I can use the factory top mounting nuts with full engagement instead of those tiny nuts that come with the Resdylift kit. Also, now there's no more excessive droop when jacking up the front of the truck.
The ride is much improved. Much more stable around turns and no more bouncy feeling over sharp bumps, and not any more harsh than the factory ride. So for anyone looking to level their Trailboss I highly recommend these coil overs. Great fit, better springs, better shocks, and a leveling kit with no wonky spacers all in one package. However, you'll still need to replace the upper control arms for safety.