When I hear "it only made X more horsepower and Y more torque", I instantly think you don't know what you're talking about (I ain't saying that's true, that is just the first conclusion that I jump to).
Heads can make an 50 HP clear across the curve, except that ONE spot where the original heads peaked, and your statement would be true, yet untrue.
The question is: How much power over the previous setup did it make, and where? Got any way to post your before and after dyno curves?
