When asking someone specific a question you need to type the @ sign before their name like this
@TrailBeast or they never know you asked unless they just happen to run across it like I did this one.:D
For 300 or a new converter if it didn't cause starting issue's I probably wouldn't sweat it.
One thing though, sometimes the tooth that is missing is right where the starter normally begins to engage the ring gear.
This is because there are places in the engine rotation where the flywheel stops at the same points due to cylinder compression.
Lets say for the sake of argument that the engine normally stops in 4 places around the flywheel.
Those 4 places are where most of the wear and load is, and those teeth take most of the pounding when the starter engages.
This is exactly why you sometimes hear someone in a parking lot hitting the starter over and over trying to get it to engage.
If this happens because of the missing tooth you are pretty much out of options and have to replace or repair it.
