Rubber Pad on 8 3/4 Spring setup?

Guys,

Here are the pics of my Rear Spring Assy. Jonn the pads on the right in your photo look like the right deal. The pad has a center button that centers through the shock mount. I was planning to replace my shock studs as they are bent by the PO who ran Air Shocks. While it was apart I was considering replacing these pads with a new or a steel block etc, as these look soft and old to me. I'm not sure what factory setup this is or is it cobbled to fit a 73 Dart?

8 3_4 Spring Pad.jpg 8 3_4 Spring Pad 2.jpg

8 3_4 Spring Pad 3.jpg