I wouldnt really trust what HP Tuners says for the calculated torque, it's kinda just guessing and uses that number if TM is needed.

But I bet it's making 300-350 ft lbs of torque to wheels with running E85 and the boost you are running.

The 4L60e can handle that pretty good though it's still weak. What is saving you in the way it gives the power and fact that the car is really light compared to others vehicles that run the 4L60e. In a truck it would likely be slipping by now.