Right there they wrote themselves out of my book.
First, it's hard to believe that you are over 4* out if you used drop brackets, new pivot bushings and the correct springs.
Moog are -.75 - +2.75 Iirc, and Jimmy and his crew have never failed to get one back
well within spec.
(Sometimes not dead nuts on, but always
very close. Safe and comfortable)
There are other (off road) companies that make ones with more adjustment, but the sleeves get thin at that point.
Be aware, that reversing a TTB truck will mess with camber and toe in.
So don't back into a space and look at your tires in shock.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.