I did do some research and one of the guys said that camshafts fail lobe when there reground I have seen it happen too a lot from not running the cam in properly --not using proper cam lube --not priming the engine with oil and turning the engine over by hand too many times before start up . I saw these lifters and they seem to be a good idea but how good they are and work I don't no never pulled down a engine that has had them what you think---going to buy a set
Howards Cams Direct Lube Extreme-Duty Mechanical Lifters