Last 4.8 I did with this cam ran and pulled better than a stock 6.2 non tuned if that helps you any... I haven't looked at your logs, but the tune looks a little low on timing in places where it needs it in the lower rpms. Just verify your mechanicals are indeed good with whatever shop verified things - ask them how they did the verification's. Honestly if it was off on the cam it should set a cam crank correlation, but will require some drive time to set the code if not out that bad.
Then when you say won't rip the tires off - power braking or just stomping from a stop?