Ok, bone headed dropping of a lifter into the valley aside, I was mucking about under the valve cover because of a banging noise, and a miss. The culprit was a bent pushrod. Before I slap a new one in and call it a day (assuming I ever retrieve my lifter), I'd like to figure out (or at least make a good guess) as to why the pushrod got bent in the first place. So, what are some common causes of bent pushrods? My 196 has less than 50k miles on it, rocker arm assembly appears to be in great shape with good oiling. No scarring on the tube the rocker arms are on, and it was installed correctly, with the holes pointing up (9 stand, welded rockers). The only thing that comes to mind as far as abuse is that the PO somehow switched the #3 and #4 wires on the cap, which obviously made it run very poorly, backfiring out the carb, etc. No idea if something like that could cause a bent pushrod. What else should I be investigating before I button it all back up?