My advice is to not go bananas with zddp.

Much above 1400-1500 PPM is rather well documented over many years to cause corrosive wear when the additive is exposed to moisture and high temperatures and degrades into an acid, spalling, pitting, bearing flaking, especially if subjected to regular passenger car oil change intervals.

It would probably be fine to exceed 1500 for break in only, and then drain. Similar to how some of us would add a little more than recommended GM EOS to
Valvoline racing or Castrol GTX in the '80s for that purpose, but the idea is to break in and then dump it fairly quickly because of the above problem.