I'm really thinking some of your clearances have got to be out of whack, or like what mikestang said. You have to keep in mind, with turning the pump fast with your prime tool is the same as revving the engine. What is the first sign of a worn out engine? Low oil pressure at idle because of internal parts worn out and clearances being out of spec. I.E. your main bearing should have a tolerance of .005 - .007, (strictly an example) and after 200k miles that bearing has worn out to about .025, so a lot more oil will seep by. You also have to take in consideration that your dizzy is not spinning very fast at all at idle, 1/2 engine rpm. So when my car is idling, my oil pump is only turning about 300-400 rpm. Just picking my own brain a little. I hope you can find the problem!