I have a set of BDS Wrangler 3.5's and I may have to go to another spring up front. I pushed the front out so far that my motor mounts and spring shackle point are about the same location.

Where can I find the dimensions of springs ie; length/width etc? I basically need a wrangler width spring eye and something about 50" or so in length, if I am going to change.

This is the best thing I could find right now Allen:
http://tennessee4x4.com/toyota/leaf_spring_specifications.htm

Cherokee rear or Wagoneer rear springs. Wagoneer having about the same offset but a stouter spring than the Cherokee. They are the same width as YJ. Not sure of the exact center pin offset but is is substantial.

cherokee springs should work. the center pin is the same distance as YJ springs on one end, so you could keep your approach, and with the right shakle on the rear it might no be to bad of a rock magnet!

Please post pics of this solution!!!