Hydraulic cam core Used for a.roller regrind?

I've talked to Ken Heard about this very thing in depth for a slant 6 cam. He said as far as the physical aspects of actually grinding it, he can do it. Whether or not it'll hold up is another story. He's done a few for some of the guys on the slant 6 .org site and so far, they're running good. He said he thought that as long as you kept valve spring pressure moderately low, you'd be ok. He didn't recommend any more than about .550 or so lift. But he said he could do it and has before. So there's that.