Originally Posted by 4Runner4Leon

Maybe it's just your photo, but I think you have bigger issues than overcompressing the rubber.

The threaded portion is bent from the end link body, which is why the rubber is collapsed at an angle. And it also looks like the end link body is at a large angle relative to the horizontal portion of the body U-bracket that it goes through. That angle should be close to 90 deg, as shown below (not fully tightened, but you get the idea):



With your severe angle, it can be expected that torquing the nut will bend the threaded portion of the end link.

I think you need to step back and look at the geometry, and figure out how to make the end link body be close to 90 deg relative to the bracket. I'm guessing you need much longer end links with your 3" lift. Do both sided look the same?