If you set the clutch to stall at peak torque RPM, that's the best you can do. With the engine at peak torque RPM, you have the most horsepower available at the axle, of course with that gear set etc. etc. You know, setting the spring height and weights on the bench is okay, if you have a baseline to go by, but actually testing the clutch for the right stall speed is the only way to tell if you've done it right. The clutch should stall at peak torque. I've explained how to do that recently, look it up. I will debate anybody who thinks differently!