Oil pump question on my future motor

Not knocking any author but most guys who pen these "how to" books are not experts as they simply compile the info they get from doing interviews with guys in the business. Often they will get differing opinions on one subject (like oiling systems) and pick the one they think is correct.

I have a friend who has authored dozens of books about collector cars, maintenence on them and such and he can barely change his own oil. Yet he is considered an expert and has sold thousands of books.