[Signman]

If you have chased the large HP gains and now searching the small gains consider this:
Low load, low volume, pressure recovery oil pump with micro polished pump gears and screen oil filter does reduce load plus will help flow, reduce cavitation and free up HP. All positives don't know the real gain but do know a prestigious stock engine builder did the tests years ago and was modifying oil pumps on his engines. Was tutored by a former stock engine builder who had a fixture to test oil pumps and oil 30 years ago. You probably know getting the oil level as far away from the crank as possible will show a large gain.
Consider this: Any engine with distributor driven at the back of the cam load on that gear driving the oil pump AND distributor should see reduced loading/unloading from the bypass open/close plus overall load will be less. Do ya think would make timing more accurate plus contribute less to valve train harmonics for gains in a couple more areas??