1967 Barracuda conv rear seat

A lot (not all) of the parts for the ‘67 A-body convertibles are interchangeable. Per the ‘67 parts manual, I didn’t “see” specific backseat springs for the convertibles just a 2D HT designation, but I’m not sure I was in the right place since the interior parts are split by hard parts in a Valiant/Barracuda/Dart column, then later by model specific interior trim. Lots of detail in the doc, but also some cross referencing that’s not completely clear.