One way to fix this compleatly is to swap a front hi pinion center in, thus raising the diff pinion about 5 inches. it is not a straight bolt in but is close. to do this you have to run the front crown and pinion, which is reverse cut to the rear.
After talking to fsome of the mad ozzy's in rocky who have raced winch challenges with 300+ hp engines running hi pinion rears for years with very few breakages.
What you need:
gq/gu rear diff gq front center gasket or goo 14,17,19mm sockets and wrench bench vise or rattle gun a clean surface to work on dial gauge indicator new fill plug and welder1.Drain oil from diff
2.pull axles from rear diff and remove center.
3.Remove lsd and crown wheel bolts from rear center .(you are now done with the rest of rear center).
4.Remove crownwheel and spider gears from front.
5.Remove and discard front spider gears.
6.Bolt rear lsd into front crownwheel.
7.Refit crown and lsd to hi pinion housing and set BACKLASH
8.Measure and mark new fill point higher up on diff housing and then drill hole.
9.Weld in new fill plug.
10.Refit the center replacing gasket and bolt axles back in
11.Refill with lsd oil and check all bolts.
12.Re-bolt tail shaft and drive away vibe free
Front center
Empty front center
Rear lsd and front crown wheel
New crown wheel bolted to lsd
Finished hi pinion rear
You could use a rear locker but this is what i had lying around.
MAKE SURE YOU KNOW YOUR DIFF RATIOS BEFORE YOU DRIVE IN 4WD.
Good luck Pete
Oh well ill just sell the lsd then