When I had talked to our Classic Tbird Club Tech advisor and told him I was getting the engine rebuilt by my local old car mechanic, the first thing he asked was if we were replacing the oil pump. When I said yes, he said that the pumps being sold by the Tbird suppliers now put out way too much pressure for the Y Block, and to take out the pressure spring and replace it with the one from the old pump, which we did.
Monday, when my mechanic checked the pressure, it was topping out in the 80+ range on a warm engine....after shortening the spring slightly, we ended up in the 50 to 55 range, which made him a lot happier. Nothing under the valve cover looked amiss. I only have a little over 1,000 miles on it since the rebuild, so we are going to give it a little more time to see how things go. As for the way it runs, it runs extremely well, idles smoothly, accelerates quickly, etc. I will just start driving it more now that we are getting some warm weather. My mechanic was not sure what type of rings the builder used, as he mostly does racing engines..but he is no longer available due to a serious medical issue to find out.