I don't believe it will fit running Magnum heads at tthe 1.6 ratio. They can take IIRC about .550 lift with 1.6s when running the longer chevy valves. You will be way beyond that. Plus, need more static, plus, needs a spring that will fit Magnums with enough pressure. I'm sure Lunati's rating is with 1.5 rocker ratio unless it says otherwise.

Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.