It is definitely border line. Comp 918s are good to .600. My Comp rep said I may be able to get away with the 918 ovate wire springs. I guess I'll see when it goes in the engine. I'll do one cylinder up and check it out for spring bind. For $185 shipped for a brand new cam I figured I couldn't go wrong. That intake duration is huge!! I might need to run my brakes off the power steering pump since there won't be much vacuum at idle.