@klinetime574 One more thing I forgot to mention, I saw your crumbled bushing in your main thread. You need to clean out the greasable pin shafts on those shackles. The debris from those crumbled bushing has likely clogged the grease holes on the pins...like a black head (gross, I know)...
This was a common issue with the Emu spring sleeves from those years (search around)....my similar age Emu springs did this too. However, your one sleeve is WAY too loose, like the wrap on the spring itself opened up some, not ideal. Maybe a spring shop could tighten that up. (?)
At one point...