replacement manual hubs
The 250 and 350 were also beefed up, Then Ford increased the front axle weight rating of the F-250/350's Dana 60 to 6,000 pounds by adding thicker-wall axletubes, 1 1/2-inch 35-spline outer axleshafts, and larger unit-bearing hubs. If you opt for 4.30 axle gears you'll get a Dana 60 with a 10-inch ring gear (a traditional one is 9 3/4). To help control that extra mass, the brakes have been upsized to 13.66 inches with larger calipers that make 17-inch wheels required.
If that's not enough might for you, there's the 7,000-pound capacity of the F-450/550 Super 60 front axle. Ford engineers call it the Fat Boy because it's approximately 3 inches wider than the F-250/350 version. The Fat Boy uses 1 1/2-inch 35-spline shafts too, the 10-inch Dana 60 gearset (4.88 or 5.38 ratios), larger SPL70 (1550) series steering joints, larger end forgings and knuckles, 14.53-inch rotors, and 10-lug hubs. Fat Boy permits nearly 45 degrees of turning at the knuckle! You might be able to mix and match parts to put the eight-lug unit-bearing hubs from the F-250/350 on the Fat Boy axle to get the big steering joints on a the F-250/350, but the Ford guys weren't at liberty to discuss parts swapping
Here is the info i have on the 05 and up ford dana 60





