I just reviewed your idle log file and the idle timing is fluctuating a lot. The PCM uses timing to make fast idle changes instead of trying step the slower IAC valve. Can you post your bin? First thing I would do is adjust the throttle stop screw (minimum air) for about 10 IAC counts with the engine fully warmed up. I would also adjust the VE table to get the BLM closer to 128. You are sitting at 105 which is rich and the PCM is pulling fuel to compensate. If you still have surge, you may have to make changes to the idle overspeed / underspeed spark tables. I zero'd out the idle over/under speed tables to calm my idle surges down a long time ago. I could probably go back and repopulate the tables with some values but overall my idle is decent considering my cam won't have a smooth idle. Attached is a screenshot of the spark tables.
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