I don't know of any pro engine builder that recommends a high pressure pump for a Windsor engine. Some will recommend/use a high volume pump, but not high pressure. There's just no need for it.
It takes energy to run a pump that hard to make that kind of pressure. Especially when cold. Lots of examples of people breaking drive rods and shearing distributor gears.
You can add additional ZDDP to any
oil.
https://www.summitracing.com/parts/cca-159