I keep hearing what you say by regrinding a stock cam and it becomes new again. My common sense tells me, you can take away some metal, but you can not add to it. So how can you get back to stock specs? I had a 350 chevy truck that had a cam with "0" lobs on two that I replaced. I don't see how it could of been reground to factory specs, unless I wanted a "0" lift.
