This is one of my favorite 4x4 forums.
http://www.pirate4x4.com/forum/index.php
The mountianeer will work, just be sure to lower you'r gears after a lift and bigger tires are added. The ***** is weak and will be short lived if you don't. The axles can take a pritty good beating so no worrys there. The front axle is a dana 35 with dana 44 outer knuckles It is good and strong.
This is a nother good forum for the vehical you are dealing with.
http://www.explorerforum.com/forums/showthread.php?t=125545
I am personaly running an 1982 toyota short bed pu, with a vortech 350 ,b&m ****** , full width axles from a chevy blazer , welded rear, detroit locked front on 35'' SSR'S