Thanks for all the advice guys, my email had been sending my peachparts notifications to spam so I had no idea.
But my plan with this arm is as follows:
It was from 420SEL that had been in a junkyard up here for about a year maybe or less, it had 150k on it i think. I figured its off the car, might as well rebuild it completely. Its got some scrapes from when they moved the car around, let's strip it down and recoat it. I recently completed a rust removal/restoration on my green SD. The coatings I used on that were pretty robust and cost effective. I ordered a new round of them for this arm and upcoming rust removal/restoration work on the gold SD.
So I sent the arm up to my mech to have the bearing, bushings and protective plate redone.
-I'll get it back tomorrow, coat it, seal it up all nice.
-Drop the existing arm, repair the rust hole and damage.
-Install the "new" arm
-Have the back glass replaced and resealed.
-Then its on to the transmission problem (
Superior Shift Kit 300SD)
I will, of course, post pictures of progress and update this thread with respect to the arm.