Rocker arm step ups

Why would you install a used one and take the chance of the same thing happening? That one may be weak or even weaker and then you may have the same problem and you may not be so lucky the next time. I had the same thing happen to me so figuring if one was weak all the others prolly were not to far behind so I went out to Auto Zone and purchased a complete set of Seal Power R-861 Stamped rockers for SB and these work just fine in my HP 340...and it did not break me, a lot cheaper than replacing a cam or what ever damage would happen...