My friend Bill had installed his self-rebuilt Street Hemi in his Coronet. He was standing alongside it revving it up and playing with the carbs when the cam plug blew out of the block, rattled around inside the TorqueFlite bell and was ejected onto his foot! Stung a little! He managed to shut it down before more damage was done and learned the proper way to install the cam plug was cup side first, just like Larry said. You never forget those lessons!!