In the front you will need locking hubs installed to be happy with a locker.
In the rear it will depend on where you drive. I drive on way to much Black Top to put up with a rear locker. I had a locker installed in the rear for about a week, Under 100 miles on the locker. As long as you are turning a corner rolling it goes clickity click and all is well. Making a turn at an intersection where you have to apply power and you get a loud bang that sounds like you broke something. Driving on Dirt, Gravel and Snow the locker may be tolerable.
A much better choice might be the Eaton Limited Slip for the Dana 44 19 Spline. This unit is still available from my research.
If you decide on a Locker I have a good one I would part with.
Bob R