call me stupid but why are only "old car" cams worrying about this? all cars have cams last i knew. are the "new cars" using a different steel for their cams? or is this more of a high lift high load issue?
Pretty much all new cars have roller cams and spring rates about 1/3 of what some HP V8 engines have. That is the difference. The load is not focused on a pinpoint area like it is with a flat tappet or slider cam.