[cpu]

On Ames I see two possible kits:

1.
FR680B: 1970-81 BACKLOCK BUSHING KIT (RE)
BACKLOCK ROD TO STEERING COLUMN ARM BUSHING KIT. ORIGINAL DESIGN WITH RUBBER GROMMET & STEEL INSERT. INCLUDES WASHER AND PIN
No photo

2.
FR680J 67-81 BACKLOCK HARDWARE KIT(RE)
KIT INCLUDES PIVOT SPRING, PIVOT BUSHING, PIVOT BRACKET BOLTS AND WASHER.
attached photo

I tried removing the metal cup part from the frame to look in there. It's frozen in place. Maybe it rusted out and allowed the bushing spring and washer to fall into the subframe.