I only have my learner's permit to pose questions here, but can you tell me about the maint/hist on your 6.0?
Have you replaced the turbo?
Have you replaced the stock head bolts with head studs?
How 'bout the EGR valve and/or cooler?
At first blush, the internet indicates the the 6.0 is the albatross around the neck of 02-07 Fords. A slightly deeper inquiry seems to indicate that the three/four known weaknesses in that motor all have mitigations.
It is a really nice van you've got; the quad seating up front would suit our application nicely.
(I am a mere lookie-lou/dreamer at this point).
EDIT TO ADD: I am not as smart as this post makes me seem. I lifted my 6.0 information from the 4-Wheel site. http://www.fourwheeler.com/techartic..._issue_solved/