The 6.4 is known for eating rockers. Could be an easy fix. Then you can sell it for big bucks. I haven't heard of 6.4 wiping out cams. Could have a broken piston too.
01 f-250, Standard
Rev tech 4" lift, 37" military wrangler Mt tires
KC diy 66, Full force 160/100 and custom tunes from PHP
Banks intercooler and full 4" exhaust, Diy S&B intake
Diy quad feed, Hydra, Isspro boost, pyro, and fuel pressure
3/0 battery cables with military style terminals