The oil pressure I was describing was with 10w 30 oil. The pressures I am describing are with fresh rebuilt engines. I do not use high pressure pumps in my street motors as mopars have always ran a little high in pressure I'm my experience. Other brands show these pressures with high pressure pumps.
I have a used set of adjustable 273 rocker arms in a box. I will take a look to see if there is anything noteworthy about them. I also have a set of custom push rods that allow them to work with a hydraulic cam.