You would have to call a tech line and maybe you will get some information. When they make certain custom grinds for a large known engine builder the particulars of that cam is kept hidden. Sometimes if that engine builder is no longer in business they may tell you more about it. Or they might tell you who they made it for and you will have to call them.Crane cam is 3-bolt with # 689506 stamped on the end. I have searched on net, no match.
Thanks!