I have to say, there's a local shop here that has apparently gotten some very nice numbers out of ported LS series heads by partial-filling the ports and machining them out again at a different profile and volume. The result is flow rates less than what most people consider "good," yet the velocity increases over stock seem to make more power than heads with massive ports and high flow rates. In short, he backs up what Bill Fisher is talking about with respect to velocity meaning more than port volume when the rubber hits the road. I'm not the expert, and even if I knew exact numbers, I wouldn't be at liberty to give them (I hope I haven't said more than was kosher already), but I've seen the dynos, been to the shop, heard it from the mouth of the man doing the work, and am familiar with his references and seen and heard his homework. So anyone who thinks porting heads starts and stops at bigger ports and high numbers on the flow bench has earned my skepticism. However, there is more than one way to make power, and who am I to say one way works and another doesn't? I'm just saying Bill Fisher's ideas aren't the ravings of an ignorant. He's not the only one who has seen what is counter-intuitive. He's just one of the generous ones who'll share his knowledge given half a chance. It's a shame people who should be taking notes and asking pointed questions are busy arguing instead of trying to improve their work.