Mike summarized our conversation well.
Sometimes the components of a freshly rebuild engine need time to get to know each other before all is good. Kind of like cooking chili; good chili needs to simmer for at least two days, and will still get better after it is reheated a few times. An engine is the same. All of the new components fighting each other create friction and heat, and require a somewhat richer mixture until all components become friends
Jon
