The 1 ton front ends have shown to be one of the most popular swaps for hard core wheelers.  The Dana 60 and our 1 ton 609 both use a 1480 series u-joint.  One of the major down falls of the front axle and stub shafts is the ear design.  This design allows for flex and deformation inside the ear which lets the u-joint cap turn and eventually fail.  The Sun 60 axle shaft set up is designed to defeat these stresses and virtually eliminate breakage.

Seen here in a Dana 60 knuckle the Sun 60 is a tight fit, but all of the steering is maintained.  All of this extra material inside the knuckle does require some custom machining. The axle shafts are made from 4340 and are double 35 slpined.  The spindle is also custom to allow extra clearance for the yoke.  In comparison to a standard stub shaft it is easy to see how much more material is placed around the u-joint, and how the U-bolt system is far more reliable than the 1/2 moon or even full retaining clips.  The yokes are made from A572, which is far superior to stock yoke material.

Description of custom work here.