I don't know about the brand new stuff but 6.0 was total different motor then the 350.
My brother runs a 6.0 in his 2001 2500 GMC and now has 170.000 miles and has not had any problmes with the motor except the injectors cloging up one time when he started using the new gas, afte the cleaned them out its been fine.
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1986 V20 
Old Fishermen never die, we just SMELL that way!!
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