I put a high pressure spring in a new pump and put it on a 400 I acquired. Someone had rebuilt the engine, but didn't replace the worn cam bearings. I finally replaced it with a high volume pump and sold the car. I boxed up the pump and a few months later installed it on a fresh motor. I had 2 new oil filters rupture around the seals before I realized what was causing it. Put a stock spring back in the pump and all was well. Sure made a mess when the filters exploded!