I just put 002 003 leafs in my demon and I needed 1.5" spacers behind the shackle hangers to get a halfway decent angle on the shackles. If you shim the front spring hangers or fabricate new extended ones I don't see you having much work to do on the back side of the springs. Should be the easiest way to just move back the rear 1-2"?

The guys saying don't underestimate the small slicks/ ss springs w/ caltracs bars setup got my ears standing up, but it seems like once you decide to start welding inboard springs and the like you might as well also consider ladder bars, tubs, etc.

Good luck!