03-04 6.0 RUN... 05-07 Maybe. Anyone with or thinking about buying a 6.0 needs to watch one of Bill's video that compares the 7.3/6.0/6.4. Maybe on the second page of his videos linked above.
For two years I looked for a 05-07 6.0 that was not running OK to take to him (I live 60 miles away) and have him repair/guarantee it for $9K. Couple months ago I found a 07 King Ranch for sale that he had bulletproof two years ago by him. Found were the original owner sold it not running right after he put a Banks Power-pack ($4000) on it and now an additional $9K (seller had receipt) to make it the last truck before all the pollution stuff takes over. It now has a Edge with four custom tunes that really brings it alive and gauges to let you know if you need to back off.