How do I get the lift I need without shackles?

I agree. That is kind of neat it puts a bit more "arch" in the spring. Might try it on my dart had the springs re arched a few years ago and are starting to sag a bit.

yeah, my calrac monoleafs have sagged too
being it is almost all street car , have thot about putting my reworked s/s springs back on it , would handle a little better on the street.