I installed an EZ locker in the front of my Dana 44. I was not at all happy with it. It kept locking and unlocking even while going down a straight road. My truck would pull left and right while the thing locked and unlocked, it was scary to drive in 4x4 mode. I pulled it out and sent it back. When I recieved another one it too did the same thing. It kept racheting and finally on one trail run it would not lock at all it would spin. I could hear it clicking really bad but it never locked up leaving me with a useless front end that would not work. I returned that one and just bought a Detorit Locker. Been VERY happy with it.
I would get the Powertrax.