Low oil pressure makes me nervous

I have to wonder about the accuracy of your in dash gauge. could it not be accurate even though you state all have been restored.. I realize to tee for both gauges can be a pain, ( try doing it on the slant), and I, like you, like having my oem dash gauges functional but I also like the info a good "real" gauges gives me also. something to think about.
I am not racer, ( never been on my plate $ wise) but, is not how the oil is distributed in a "race" application more important than the viscosity of the oil???? just wondering.