Torsion Bar nomenclature
The 347 could also be a date code, these are bars from a AAR Cuda 130 = 13th week of 1970, 778 - 779 are .900 diam
The 347 could also be a date code, these are bars from a AAR Cuda 130 = 13th week of 1970, 778 - 779 are .900 diam