Welcome to the org.
(Boy, we need a separate thread for this question... lots of 6.4’s must be getting to the point of being priced right these days.)
You’re going to get two opinions here.
1. No problem
2. Big problem
there’s no easy answer. Deleted, not deleted? How much do you have to spend while you own it? The 6.4 are not known for their longevity. I’d suggest spending a few days reviewing all the differnt posts on the 6.4 here, and other forums, and YouTube. Lots of info to digest before you buy one.
I had one, loved it. Never relied on it. Imho, it was a toy that could cost $15k at anytime. Once I accepted that, I was very happy with it. For work, I relied on other trucks, including a 6.0 for reliability.