I have a lead on a brown crinkle 319w-I'll find out over the weekend whether I'll get it or not. I know that it can take cams; what I don't know is what kind, or what the differences are. The 319 takes flat cams, right? What's the difference between flat cams and top hat cams? A lot of the cams I've been seeing are for either the 400's or the 600's-will those work? Anybody got a picture of the different kinds?