At least after reading this thread you know what to save up for when you buy a 6.0L. Every truck has their issues, but this specific motor is now pointed out exactly what issues are common. I would buy the diesel that is easier to work on, and has the best "guides" as to what you can expect to repair.
I've helped pull the body off a lincoln navigator to do an engine swap, and we ended up having to do it twice because of an injector stuck wide open and bending a rod. I can say that labor adds up fast when you work a full time job and have to come home and do major jobs. So I would think it would be practical to buy something easy to work on for when the problems do happen. A lot of the 6.0L motor is buried under the cab so it can be a nightmare to begin a head stud job for someone like me.
