We avoided disaster on our 5.2 Magnum build. ALWAYS inspect OOTB Heads !!!!
The last engine I was putting together, I took to a machine shop where I used to live. It’s 3 hours away from me now, but I figured it would be worth it since I know they do a good job. They did do another good job, but they forgot one of the valve stem seals on the heads they rebuilt for me. Luckily I inspected them before installing them!