vt365
I would definitely stay away from a vt365.
I called about a nice looking chip truck and when I found out the motor, the salesman said its a good motor as long as you only drive 10-15k miles a year and not for someone going to drive 30k a year. HUH? Now that is some salesman BS! So it breaks down in 2 years instead of 1. duh.
That being said, the DT 466 is not perfect either. Common failure is cylinder sleeves start leaking coolant into oil. Results are in frame overhaul for $8000 unexpected dollars. This just happened to my bucket truck (02 4800). When I called the local International shop and described the symptoms, he knew immediately what the problem was without even seeing the truck because it is so common.
So, you roll the dice no matter what. But your chances are better with another motor than the 6.0 liter.