I'm not sure what you are referring to. I tuned my 6.0 within two or three months after I bought it and never had an issue with the tunes I ran. I did do headgaskets at 185k miles, but there's been a lot of non-tuned trucks that didn't last that long. That truck is still going strong at around 275k miles now and still tuned with SPD.yeah i'll pass on aftermarket tunes.
I remember that duboggle back in the ol 6.0 days.