Crap.
Setback today. I broke the drive hex on the oil pump drive.
I have primed this motor with a drill at least a dozen times during different phase of the build (no lifters, with lifters but no pushrods, pushrods no rockers, and fully assembled.
I have run the engine in the garage about 4 times before today. But when I started it today it had zero oil pressure.

I will have to pull the oil pump and do some investigating to see if anything else has a problem.