What do you want to do it for? Looking for more capacity or mainly the tighter turning? There were a couple years that the wide axle was an option on the F350 as well. I'd look more in to that for your application just cause it should be easier to just bolt up.
I would think it should be easy for a competent front-end shop. But you would have 2 different bolt patterns front to rear, plus the gear-ratios would need to be changed from 4.30 or 4.88, depending on which you put in.
But, I agree, the decreased turning radius is really handy.
Not only 2 different bolt patterns, different wheel sizes. 17" vs 19.5" If you are willing to change the wheels and tires, then it doesn't sound like too hard a project. You would need 8 to 10 bolt adapters for the rear.
Need to ask some front-end shops, but that is probably going to be a another problem--I haven't found many shop familiar with the 450 front ends.