difficulty adjusting clutch sweet spot

I'm wondering about this article from Mopar Muscle:

http://www.moparmusclemagazine.com/...12_four_speed_a_body_clutch_pedal_adjustment/

I know it says that it's mostly for high speed shifting, but what it does is to provide more throw on the clutch fork. To my way of thinking, that's exactly what I need. Has any one done this? Other thoughts?