Correct this was just a reference to the spring pressure that I now know I have on the cam that I have. this was the recommended spring and pressure for the heads that I have and the cam that I have now. So to me it would stand to reason to get a spring in the correct installed hide with the same or at least close spring pressure. I believe the ones you suggested we'll be the ones I go to once I confirm the ones that came with the heads are not adequate...