So i'm finally going to be installing a cam here in the next 2 weeks. Im ordering the springs, pushrods, and ls7 sprocket today. I've got a 5.3l with the DOD system in it and I keep getting mixed reports about the lifters in it. Some say they are weak and will break and some say they are good. I would prefer not to pull the heads if I don't have to but if they are no good I need to know. Does anyone know for sure?