I agree on the 9.50 comment.. but as far as the heads being unproven I have to disagree. We no more took them out of the box put what cam we thought might work and used that BS intake Edelbrock provides for them and went 9.20s. Then we beat on it a little more and go 9.0s so I'm not sure how that's unproven we I am the only one trying to make them work. They flow better than any out of the box head that has ever been available to us and all everyone has done so far is complain about the price. It is what it is it's not cheap to race we all know this! Nobody says you have to use a Ritter block somebody take a R3 or hell even a stock block and put a set on see what happens. Unless people start working on the combination we will never know. We did it the way we thought was best so someone else needs to try another road.