Zinc Additive for Flat Tappet break-in?

Just bought two bottles of the Hughes additive yesterday evening. I will use it for the next two oil changes to see how it works. I just eclipsed 2,000 miles on my new rebuilt 318 with comp bumpstick and moly rings, so maybe I will use that additive and go ahead with a synthetic such as Mobil 1 while the seals are fresh and the motor should be broken in enough.

Opinions?? Uh oh, we just opened another can of worms. Quick, call the pest control, before it goes out of control....lol:-#