Here is a question relevant to the subject: What parts are different on the wide track front axle?
I haven't explored this in depth yet, but it appears that one could convert (I'm talking here about 2 WD). The axle, radius arms, hubs, perhaps brakes, springs, perhaps steering box and links would need to be changed. Those could all come from a wrecked donor, though they'd be rare. The fenders would need to me modified. It might be done for $3000?
I've contemplated this for my F350 2WD. There are two reasons for it: the turning radius obviously, but also it makes fitting air suspension to the front much simpler.
