That's a serious question for your first post.
And, you know what they say in Hot Rods..."Anything is possible with a big enough wallet"
Yes, a Ford Diesel could be swapped in place of a Triton V10. You would need the entire wire harness plus the engine and transmisson, so a donor truck would make it much easier.
If you are talking about doing this in a F Series, it would just be a lot of swapping parts.
If you are talking about a V10 F53 Class A chassis, then it would be swapping and modifying everthing due to the different layout.
And finally, if you live in a state with SMOG laws, it might not even be able to be licensed once finished.
If you do it, I hope you take lots of pictures...and share all about it. I am sure many people would like to have a 6.7L Ford FRED (FRont Engine Diesel) too...Ford just doesn't offer it.
Best luck