2006 and 2007 6.0’s are good. The one before did have some issues. I still have 230,000 on my 2005. Most of it on a super hot tune. I do have new head and new injectors.About $15k. Why would you swap a 6.0?
They are not as bad as you have been told. I hammered on mine a lot for over 200k miles and it never laid down.