I just bought a B-31 Anderson ford motorsports cam. When he shipped it and it got here i got the cam card and everything. But the cam had B-31 looked like hand engraved into the side of the cam. But then i seen a few other anderson cams and they also looked like they were hand carved seriel numbers. Anyway i can tell if this is a B-31? Its got 2 long seriel numbers on the other side.