How to physically see and feel a bad roller lifter

I’ve wondered this myself. I reused the old lifters with longer pushrods on my 5.9 with a reground cam and hughes springs. There’s no soft lifters or any play, but the thing makes some noise. I’m kind of thinking that maybe the lifters are just worn out and that they aren’t up for fast ramps and heavy springs. Could also be that my pushrods are too short.