Advice on moving forward

Rumble, I have SuperStock Springs with just some regular monroe shocks in the back. No pinion snubber. I am gonna ask about that 3rd member and see if I could pick it up this weekend. In the meantime, just waiting on some parts and then hopefully when it is not 90 plus degrees, go to the track and test stuff out. There is Mopar Magic up in Sacramento on the 10th of September that I would like to get some runs in.