Originally Posted by wifordx4
Bluejay is correct the one sure way to tell its not the lifters is the fact that it doesn't have lifters
Not exactly. OHC engines have hydraulic cam followers, which essentially are "lifters" and can make the same noise when sticky or collapsed.
With those noises and issues, I'd take a pass on that truck. 2004 was the first year of the 5.4 3v and it definitely had some issues.