Thanks Dave good to know... I'm leaning towards upgrading the springs because this engine will be hooked to a manual transmission and I want to be able to redline this baby and speed-shift without worrying about breaking a spring and dropping a valve. I also mentioned pushrods because the one that was on the failed lifter got bent, guess I can just replace that one and call it good, no use in replacing all of them as a "preventative" measure? This 5.7 has 135k miles on it btw...