which endlinks are you trying to replace? If it's the rear (more then likely with a lift) you can get 3rd gen front endlinks to level it back out (I think they are 1-1.5" longer then stock). On mine, i had used land cruiser coils which gave about 3.5" of lift so i used endlinks from a 2nd gen 4runner (about 1" longer over the front 3rd gen endlinks) and that leveled it out.
I have been looking into making my own longer links. It should be too difficult, just a bit of time spent browsing McMaster's webiste. I plan to use these to replace the ball joint: McMaster-Carr
Elton, thanks for the link! You should be able to get away with simply using a jamb nut where he welded the rod. That will make it easier for folks to build their own.
Well, the anti-sway bar is attached to the frame and the axle via that link. When you lift a vehicle with a suspension lift, you separate the frame from the axle. Unless you lengthen the sway bar links, then the sway bar will be in a different position which can cause contact issues. Extending the links will place the bar back at the proper position.
The anti-sway bar will limit articulation when left connected. Quick Disconnects are a way of easily disconnection the sway bar to keep it from limiting your articulation.
It's not a good idea to completely remove the sway bar on a coil sprung vehicle, because you will greatly increase the body roll of the vehicle which can be dangerous in high speed situations.
I cut mine in half and welded an extension to it in the form of a pipe that I slipped over both ends. Mine are 2 inches longer front and back now. Took about 1 hour for all 4.