I was wondering whether anybody has changed the lifters in their engine without changing the cam at the same time? I have heard that if you install a new set of lifters with an existing cam, you can wipe out the lobes, but I have also heard that people have fitted new lifters and had no problems. I want to swap the stock hydraulic lifters for a set of Rhoads lifters in my Cleveland but do not want to wipe out my cam (Comp Cams 268H, approximately 500 miles use). Any thoughts?