No oil to top end

CFD244 said
The melling HV I put in gave me 65psi with a drill.

I've run HV pumps in all my engines for 4 decades... Daily drivers and NEVER ONCE ran the stock oil pan dry...

And all Melling oil pumps come with the high pressure spring to give 72 psi give or take... 65 psi is right in the ball park there...