dssur
+1y
camber doesnt ruin tires, improper toe does. The most important thing to do after you crank your torsions down is take a measurment with the tires pointing straight ahead from the center of the tread on the left to the center of the tread on the right, then repeat behind the tire and compare those two measurments. adjust your tie rods till they these two measurements close as you can get to even.
If you are worried about extreme negative camber though, you can move your balljoints from their mounting posiotion below the control arms to the top of the arms. Doing this to the lower balljoint will lower the truck almost an inch and not change camber, you will need to cut a hump from the top of the arm to let the balljoint sit flat and also trim under the arm to let the bolts go back in from the bottom side. Doing this to the upper balljoint changes the angle of the upper arm and gets rid of some of the camber.
If you are loosening the torsions, be careful that they dont hang below the frame because they WILL drag off or get yanked out and you will be screwed. The way to fix this is to loosen the adjuster all the way, (TRUCK ON JACK STANDS getting crushed by a truck is a stupid way to die) then make a reference mark on the torsion bar and the lower arm where the torsion bar slides into the lower arm. Then pull the torsion bars out of the lower arm and turn them so they are "looser" still, about 4 splines. Now when you put them back in, you will have to crank the adjusters up more to get the truck off the ground, this keeps your adjusters up high in the frame where they wont get yanked or drug off.
I wish I had some pictures, but I hope I got it clear enough for you. The important thing is YOU WILL SEE WHAT TO DO while you are doing it. For example, the lower balljoint wont sit flat on the lower arm till you cut/grind away the hump, and the bolts wont go back in till you make room for them. Its intuitive, just do it.
Like James said you will need to cut off ALL the bumpstop mounts and probably clearance the lower arm not to hit the frame.