360 Head valve spring install questions. Comp cams 995-16.

Assuming small block installed spring height of about 1.69 inches, which I doubt you have because of the rotators, those springs have 115 lb on the seat and a spring rate of 402 lb/in. What do your heads flow? I doubt there is little to no gain past .450 in lift. Anyway the thing to do is match your components and not waste money and effort for no or negative gain. On anything I want to run on the street, I always run viton stem seals and single springs.