To add a little more to the thread. When I went with the volume pump, I checked one main and it was .0015. That's where it should have been. I have the bypass plugged and using a remote filter. I also use 20/50 Synthetic blend oil with Lucas. On initial fire(before it warms up) the pressure should be higher. Now it is less than 30 pounds. When you increase rpm's, the pressure comes up very slowly, but not much above 40. I can't say anything about other rebuilders, because I am the rebuilder. I am sure everything was right when it went together. (you know how that goes-sometimes right ain't right) I'll know more when I start the tear down. Got a couple of more projects before I get to that one.
