So I'm about to send off a new old stock HO cam to Crane cams for a regrind. I was looking over the cam and something stuck me as odd about the cam. The cam rattles like something is inside it and after looking over the cam I found many holes in it for what I believe are oil passages. Are the cams for the first gen escorts hollow? And is there suppose to be something inside them that moves around? My guess its something to do with the oil passage holes. Or maybe its just a bad cam? I'm not all to bright on cams, more so cams for such a new motor so I have to ask.