New valves/ valve springs with new cam?

If I would have known that were made by crane, I would have went elsewhere. My first 340 I built with a mechanical cam had crane push rods, springs and retainers. After a dozen passes, I went to set the lash, several broken retainers, springs we're weak with a 500" cam. Put stock 273 push rods, Direct Connection springs and retainers on, many thousand miles later it still spins to 7500rpm without any problems. Some people get good results from crane stuff but I won't spend my hard earned money on it after experiencing those kind of failures in such short time