Using a propane torch and a lot of hammering, I was able to get the mounts into shape to fit the new set of Rancho shocks. The mount looks more natural to me now, too, so I'm guessing it's back in its original position.
She's back on the road and handling much better now.
Upon closer inspection, I think the person who installed the previous shocks reshaped the lower mount a bit:
I doubt anyone has a picture of a stock mount handy, but I think if I straighten the arm on the left out, the RS999145 will fit.
Correct front shock part # (http://www.gorancho.com/products/shock-absorbers/rs9000xl-shock-absorber?find=1992-toyota-4runner-4wd-313376), attempting to install them in the front as well. ;)
Has anyone installed Rancho RS9000XL (Part # RS999145) in a 1992 Toyota 4Runner 4WD before? I double checked with Rancho that this is the correct part for my vehicle, and that what I received has the correct lower mount type, but it's quite a bit wider than the mount on my vehicle (being...