I wish you had quoted someone else!!
I have a lot of respect for Mr. Yunick.
I have always felt the lack of need for variable advance on a RACING engine was because they operated in such a narrow power band and at such high rpms' that variable timing was a waste of time. I agree with Mr. Yunick.
A street engine that has to perform at a wide range of engine speeds may be different?
Also - while the peak power may not be affected by the curve - I do believe that peak power may not be as important as power developed through the rev range..
I do have a question though - when was the Power Secrets book written? Could it have been before the advent of modern ignition systems?
Pat