What do these torsion bars belong to?

The A-body torsion bar length is 35.8 inches.
From 1960-1965 Abody bars part numbers run from 2071622-3 -2071628-9.
65-76 torsion bar numbers2535888-9 DIA.83 and 1.25 hex across flats
2535890-1 DIA.85 1.25
2535892-3 DIA.87 1.25
2535894-5 DIA.89 1.25
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