This is an odd one that I can't find a pic of in my 1969 or 70 fsm's.
Miller C-4211-11 that I found referenced on the web as "stretching fixture rear spring & hanger" (the middle bolt thread is left handed, and the tool diameter is 1", so would be for B and C body cars)
C-4211-6
C-4211-9
C-4211-4 I found referenced as "rear spring hanger remover installer tool"
Miller C-4211-11 that I found referenced on the web as "stretching fixture rear spring & hanger" (the middle bolt thread is left handed, and the tool diameter is 1", so would be for B and C body cars)
C-4211-6
C-4211-9
C-4211-4 I found referenced as "rear spring hanger remover installer tool"