OK in an effort to get a jump on my rear spring project, tonight I went down and put the Rook-mobile up on jackstands and crawled under to have a peek.

If your current springs are sagging, that could be a big part of the problem.

Ya'll write this date down in yer books....it may never happen again, 'cause Imma gonna agree wid BlueBarry!! 

The rear spring may indeed be saggin a little, as we all do with age. Longer spring bolts give you more adjustment for raising/lowering the rear ride height. Stock, factory style bolts have a shoulder on them that will not allow much adjustment. Aftermarket, longer bolts will allow adjusting the height up/down some.If you have the original bolts, and the rear sits too low, your spring itself is likely sagging. Using a shorter bolt, or one that allows more adjustment will only cover up the problem, but not correct it.
btw...the cars usually have a little reverse "wedge" to begin with...the front sits a little higher than the rear, even when new.

Yep, more than likely time for some new rebounding energy in the back end. Composite monoleaf is the way to go!! 

Hey, Joel, I can be right every once in a while! (write it down, though, it doesn't happen often).

 

Dan, A pertinent question I need to ask: Did ebo ride in your car before the suspension started sagging?................or what?

He did indeed ride in it, but the sag was already there.........

Darn...............I kind-a thought ebo had something to do with it? Maybe it's sagging more post ebo than pre ebo. And you would let ebo ride in it.............That's like bad karma......... You, really never know..............could have been even good karma..........(now I'm confusing myself.........I can easily do that to myself.............)