Ok.. different rig, but my setup is the same on All my shaft driven trucks..
I can't quote any of it, but... The idea I learned, years ago, from my start, in the creeper section.. from someone Way more knowledgeable then me..
The pinion angles work with and against the drive train..
The angle of the pinions, also work with and against the gears.
The force from the drive shaft at such and such a angle, put force thru the gears in such a way, blah blah blah.. (just a general drift, from 2012) lol..
Like learning and remembering, squat and anti squat...
But instead of links and shocks, it's geared towards, drive shafts and gears..
My front pinion angle, never really moves. It keeps my caster, the same, thru the whole suspension cycle.
Another thing to remember, depending on your your link mount.. I always try to keep my rear uppers, centered over the axle.
Which never changes, thru the suspension cycle.
Personally.. a MIP will Never come off the front of my rigs..
It's heavy, it's forward, it's low, and it's undesTroyable! Lol...
Next thing to check.. see the little shiny marks, on the ears of the uni's..(you can actually only see one).. look for those marks on your front shaft.
It's normal for uni's.. they will clearance themselves, enough, and smooth out.. (as you can tell from the angle of my rear shaft)
This is how you take care of that..
A little grinding is good for the crawlering soul..
just a little tho!
Which aids in all kinds of angle!