Tomer,
English is the best I can do right now...
A lot of us includes me have experience with automatic lockers in the front axle, with and without hubs.
Since you have the NV241, in the road you are driving with rear drive and you will not feel any difference.
while driving off road, 4wd engage and hub in lock position you will fill that the steering is slightly stiff (harder), beside that after turning the steering wheel it will try to return back to straight position.
if you have found detroit locker for the front d60, go for it !!!
be aware that probably you have 30 splines axle and not 35 splines like in the rear SUFA axle.
if you need it in hebrew - write me again and tomorrow night i will probably be able to connect with hebrew support.
Arik
ωξψε ςμ χωψ