bernica Mike the springs you are talking about are part# 26595 seat load is 150lbs and open is 370lbs on a 2.00" valve. coil bind is at 1.150". This is the only set they list for a cam with over .600" lift. The others are for LS1 motors. Keith knows more about the seat pressures for certain cams than I do. ( but learning fast). The big point from comp is getting as much
oil to help keep the springs cool as possible. If you are running dry sump system, spray bars in the valve covers is what they want. Wet sump, they want as much
oil and flow to the heads as possible to help remove the heat from the springs. They want you to try and have the return
oil not hit the crank as is cost HP. The important note is that you have a single spring holding the valve, if it breaks or the valve breaks there is NO safety net. There is another article about different diameter pushrods the there strenghts. I thought that thick wall pushrods where the way to go but this is not 100% true. I will save this for another thread. Good luck Mike Rick Lake