Priobe, your
oil pressure numbers are fine. I've seen dozens of well built FEs and those numbers are nothing to worry about. Did you know that from the factory the
oil pressure idiot light didn't come on with FEs until they hit 4 lbs? So long as your pressure comes up when you blip the throttle, and you're getting upwards of 50 (and you're all they way to 70), your pressure is not an issue. You need to know more about the leak down tests though. That's a test you can do in your own garage and it may very well help you pin down some of your problems.