0.14% phosphorus is the maximum you should run in a engine that is broken-in. There's more to an engine oil that ZDDP content and I think Heavy Duty Engine Oils are better than racing oils for street use. See Corvair Oil Article.

Widman recommends HDEOs with higher phosphorus contents but a ZDDP manufacturer suggests that 1200 ppm is a good target. See ZDDPlus™ Tech Brief #2 – ZDDP and Cam Wear: Just Another Engine Oil Myth?.

I use Petro Canada Duron SHP 10W-30. It has 1200 ppm of phosphorus and have no problem getting 75 psi above 2000 RPM with my stock oil pump.

To get more life out of your engine, see Engine Wear.