Well, admittedly, it won't do THAT, but it is the most accurate way to degree the camshaft. IMO, you won't come anywhere near valve to piston contact. Remember, it's the duration that makes it happen, not the lift. It's the WHEN, not the how much. Those pistons have pretty generous valve reliefs. Even still, you really can't be too careful. That's a lot of money you have tied up.