Brother, I don't think you have much to fix. The cam is throwing you off like dave and mike said. Post the graph if you don't mind. How lean is lean? What are you running for jets?
With those mods, and a T-56, you could certainly use more gear. Don't know how it would affect how the NOS hits though, you'll have to experiment. Don't worry too much about the torque peak, peaks don't mean squat, its average horse power that makes a car fast.
Adam