I can't help with the shackle reversal, I've not done one.
I will add I use a MORE steering box mount, I don't remember if it moved the box forward. I do know I'm using a stock pitman arm, and my drag link and tie rod don't make contact. They are close though,
If I were to do it all over, I wouldn't change anything, I like my Jeeps to look as much like a Jeep as possible, and with the exception of the Obstacle I mentioned , and 1 other ( don't remember the name, but it's just before the final hill, this is the one I winched on, the jeep may have made it, I didn't have the Testicular fortitude,) on the same trail,(google Prittchett trail) it does everything I need it to do. It has a real good break over angle.
1957 WILLYS pickup,
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac.
1980 CJ5 trail Jeep.
1989 YJ the CJ to YJ.