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The conversion kit just has factory manual hub parts in it - you still have to buy manual hubs, and one brand is about as good as the next - I use MileMarkers but most people (including the factory) use Warns. Here's what it looks like on the older trucks:
http://www.webphotos.com/list_photos.asp?mi=3&smi=2&a=66946
The '97 and up F-150's have an (IFS) Independent Front Suspension Axle. It is very different from the pre '97 axle. The 80-96 4x4's used a (TTB) twin traction beam axle. The hubs on this axle stick through the wheel and can be manual or automatic. The '97 up axle just has a flange that you mount the wheel on, no hub sticking through the wheel.
Well I just heard back From Warn, they do not offer a manual lock out for my truck
I had a Ford mechanic tell me that that front axle is always locked together it only disengages from the transfer case,
(was wanting to convert for fuel enconomy and durability)
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.