An extra thousandth of clearance on the rod and main bearings will cause more pressure drop than the tiny amount of oil that gets returned to the oil pan by a bypass filter. I'm working on a project to put small block V8 pump gears into a stovebolt housing that will result in about a 20% increase in oil volume. When that project is done we're likely to see 216's with 30 pounds of oil pressure at idle, even with a bypass filter onboard!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!