If it's a permanent locker as in Lockright aussielocker Detroit etc . You're turning circle will be compromised.......
I was ar this stage....(many moons ago)
My journey through this was as follows.....
2low kit in transferbox.....
Dana 300 flip kit with twin sticks......(poor boys atlas but you can't shift on the move ...need to stop.....not allowed in trials......
)
Finally went withARB in front after 7 years of trying to avoid them......
With hindsight which is a wonderful thing I would now do the following.
2low kit
ARBs front and back
Hydraulic fiddle brake for each rear wheel for super tight turns in front,wheel drive.
But life money and karma is never that simple.....