[Oldsguy]

The first one, you put the rod on the oil pump, ring lowest, then insert the rod into the hole and mount the pump. Later, before you install the dist, you can engage the top of the rod with a socket to fit (can't remember the size) taped on the end of a long extension which is chucked into a drill. Then you can drive the oil pump with the drill and prime the engine, especially the upper valve train. This is really important with new components.