What do you have the timing set at? Should have a light on it that will read the degrees of advance when you do the cam break in run... For the run in, at 2500 RPM the timing should be around 28 to 34 degrees total. At 2500, all the vacuum advance and most if not all of the mechanical advance should be in so you will be reading total advance. Timing needs to be close during the run in so that you don't overheat the engine... As Don mentioned, you also need to have a zinc additive in your oil!!!!