Unless you go part time t-case and locking hubs, do NOT do an auto locker in the front.
What has been said is correct. I used to drive a 69 Chevy 4x4 with limited slip F/R, locking hubs, 4 speed, and 375 HP.
When in 4WD, hubs locked in, all 4 wheels turn the same. When I was in greasy mud I...