4x4 explorer front end conversion

[the big green tractor]

so i have a 1992 ford explorer that i just picked up and i want to swap out the stock front end diff with a solid axel. what would be the best and most cost effective axel swap? (i want to go used off another truck) any help feed back would be much apprecited.

 

[disciplerocks]

http://therangerstation.com/forums/search.php

And you might want to post in the proper section.