Mark, thanks for all the input. I was hoping this would have a little more kick daily driving, I have not towed with it yet.
I was reading where this engine/trans. is a little different from the LLY, the torque converter was supposed to be "beefed up" from the `05, to handle the extra power and the engine is 50HP and 60 lbs. torque more than what I had right?, but this feels about the same as my `05 did when it was stock, when I added the Edge, even on level 1 it ran like a raped ape", level 2 was too much as I said, I am a little dissapointed in the way this LBZ runs and the mileage.
I hear what you are saying about having too much added power stressing the stock parts to their limit. My truck is bone stock, was purchased from the original owner, I know it never did any heavy towing, as there was no brake controller hooked up, and the factory harness for it was still in the glove box, but, GM did just replace the turbo under warranty this year. It went in for a poor performance service call, and thats what they replaced along with re-flashing the glow plug system, so without any heavy towing, not sure why they had to replace the turbo.

As a side note, i was under the hood on the truck today, and saw that the air filter plugged up indicator popped out, so I looked at the air filter and it was filthy, so I bought a K&N for it, $75 later I installed it and reset the indicator, not sure till I drive it tomorrow if that will make any difference, I figured if it was really bad it would have thrown some sort of code or message on the DIC, which it did not.

Where can i get some info on a Kennedy tune as you mentioned, is this a programmer type like the Diablo or Edge?

Do you have any family in the WNY area?, I used to work with a father and 2 sons named Rinker, Dale, Mark and Mitch.