Right Wedge it is. But I do look at a lot of the engine masters builds and I notice basically what we are all talking about. Low duration 230-250 @ .050 and 600-900 lift. Also they seem to run the biggest intake valve they can fit. In some of the heads the street class they must of moved guides to get a big valve like a 2.100" or bigger intake in RHS or Pro Comp smallblock heads. With the bore sizes they are running I'm sure they are exceeding the limit of the 52% bore to intake size. All and yes they do seem to get them spun up near 8,000 with a little duration cam. But like Mr P Body said they are looking to make torque and through a certain rpm range.