Is there such thing as a good lifter?

Well I use the Lucas Hot Rod Oil. It is supposed to be high zinc and the right stuff to use. My oil pressure is 50 cold and never less than 15 hot. I don't think incorrect oil is my issue. Once I get it out, I'll take it apart and see what I see. Unfortunately it will be a crap shoot whether the new one I put in lasts or not. That is if the cam is ok.

Cley