You will need to know what the installed height is of the valves to be able to correctly determine what valve spring you will need. A solid lift cam requires more spring pressure than a hydraulic cam of the same lift, so its not simply a matter of just slapping them on there and go, its more involved than that. You will have to find a valve spring that will provide the 1)correct closed spring pressure at the valves installed height, 2)while allowing enough total travel for the valve without being too close to coil bind or having the retainer hit the valve guide or seal, and still provide the 3)correct open spring pressure, while also 4)fitting the spring pocket for the cylinder head. Once you find a spring that will meet all 4 of these requirements, thats the spring you will need. Installing a spring that is too weak or too strong can cause serious engine damage and failure, this is a place you should never consider taking a shortcut.
