My car is Missing

Well the problem has been found. After replacing wires, plugs, cap, rotor and new distributor in which is an upgrade to MSD Pro Billett still had the misfire. I removed the valve cover to look at the valve train to see if a srping had collapsed and low and be hold there it was, the push rod about .100 thru the top of the rocker arm. So after buying a $3.79 part my car is back together and running fine. I do have one concern, where did the piece of metal from the top of the rocker go? Its basically the same size as the end of the push rod. I did not see anything laying on the head and took a peak down inside the belly and saw nothing. Drained oil and stuck a telescopic magnet in the oil pan and went fishing and came up empty. It prolly has dropped down and is laying in the front part of the oil pan. Thanx to all you gave me advice....