I have been using ZDDP Plus for the past few years. The last time I ordered from the website I ordered a case. This way I always have some on hand when I decide to freshen up the
oil and filters.
As to wear...I have no idea how well it works. But considering the investment in a 427 sideoiler with a flat tappet solid lifter motor. why would you not run it? Besides, there is too much information on the web that documents the need for it. If Comp Cams says it is needed, I'll use it.
Bob