I guess what I can do is cross my fingers, take it to the nearest Ford dealer there, maybe the same one who did all the servicing on it, have em drain everything and go right over it, and then hope like hell that it makes it back here 2000 miles.
Definitely go back to *that* dealer that did the maintenance.
Make sure you drain the water separator (see threads here about that), checking for good flow, little water, no waxey stuff etc -or- have that servcing Ford dealer replace the fuel filters with a good internal inspection of the old filters (especially lower) and the lower filter compartment and drain.
Most Ford stores give you a "free 999-point inspection" with an oil change. Tell them that you expect them to do it *completely*. I'd do my best to hang around the service bay (yeah, I know, insurance doesn't allow it - but I do it anyways) and ask the tech to walk thru what he's seeing with you.
Pay attention to the drivers side lower corner of the radiator, that's where many of the problems show up. Also, read up here about checking the Degas bottle cap area for white residue. If you can, change out the cap with a Ford part, just to be safe.
There are other threads here on checking 6.4Ls specifically. Look for them, there's a wealth of info here built-up over the years, but you have to look hard sometimes to find it. It's worth the effort.
Good luck, and enjoy the drive back home in your new 6.4!