So I tried to replace the original shocks last night on my 01 4runner with replacement OEM ones. So yesterday I tried to do the rear ones, thought it went smoothly, did a 1 mile shake down, it was make a noise, came back and right rear side was noticeably taller.
I park it overnight, check it out today, and the right rear shock has now mounting hold large enough the bolt could slide through.
When I removed the old rear shock, I didn't feel any washer or bushing on the top side of the mounting bracket. So just did the nut there directly. I couldn't fit a torque wrench up there so I just wedged the ratchet wrench against the body and twisted the shock as good as I could, same as taking it off.