The actual answer to your question would lead you to the company "Bullet Proof Diesel", and I would imagine their "full bulletproof kit" would give you the definition you're looking for.
Most of us are working toward what would probably be safely considered "semi" bullet proof, as we mostly don't choose the BPD external oil cooler.
But you've got most of the list in the above posts. It would certainly require:
-a gauge set of some sort to read data from the OBD-II port that can do the 6.0L properly. Either Scangauge II or Edge Insight is most common
-a known good oil cooler, whether OEM or BPD
-for years with square cooler, either a EGR cooler delete or the improved cooler from BPD
-either frequent replacement schedule for the Ford Gold Premium coolant, or preferably, replacement with CAT EC-1 rated ELC coolant
-a coolant filter
-for years that have it, replace the STC fitting
-stand pipes and dummy plugs for some years (not sure which)
-blue spring kit
-OEM oil, fuel and air filters
Most of us aren't planning to do the studs unless we have to.