I would NOT install an autolocker or LS in the FRONT differential. Rear, yes for inexpensive option.
I ran a LS in F/R on a 69 Chevy pickup way back when. (Selectable lockers hadn't been invented yet....)
When on slick surfaces (mud, snow, ice) it was almost impossible to turn when in 4WD because ALL 4 tires turned the SAME speed. The very first time I was in mud, I tried to turn between some trees and almost tagged the tree because I was expecting it to turn and it didn't. I had to burp the throttle to rock the truck and front axle to get it to go another direction.
I was doing a long sloping RH corner on a 100% ice/sleet covered 4 lane road. As I came around the corner at 35 MPH, the truck would not change direction and continued in a RH slow turn, no matter what direction the front wheels were pointed. I had to lock my brakes, jam it in reverse (manual) and floor it in reverse to get it to slow and change direction a LITTLE. I stopped 8" from pegging a light post dead center on the front.
It could go almost anywhere and could pull out loaded semi trucks, but I had to be careful in the slick stuff.
If money was no object, I would do selectable in F/R.
To save SOME $$$, I would do a Lokka Or Aussie in the rear, and an ARB or Harrop in the front.
I would also consider doing the cable lock Harrop to avoid any electrical issues and no additional compressed air required (OBA)