It's a shame that guide went away with the C-C site.
Me and others used that template for our OD swaps.
The 518 is by far the best mod I've done. Car is so much more enjoyable to drive.
https://postimages.org/][/url]
Those will probably get you close.
I bought +1" springs when I redid the rear. It was too high like yours, so I moved the leaf to the other spot on the hanger and that did the trick.