Well now I'm a little more concerned about rear ride height. The picture below shows how my car currently sits on the 40 year old 318 springs (I will be lowering the front a bit). The problem is that I used extended shackles on the leaf springs because the old wheels used to rub, the new ones have no issue so I was planning to put OEM shackles back on. I was already worried that this will drop the back a tiny bit, but now it sounds like the Mopar HD leaf springs might drop even more. Crap, I don't want to lose another $50 shipping these back to Summit.