Yeah I'm begging for it to explode. I can't wait.Sounds like you're wanting to blow up that engine.
I don't know much about 30 year old truck engines like yours but 2100 seems too fast to be running it.
Everything I can find says that's normal factory governor and won't hurt it. It seems happy and settled in there, not like it's gonna fly apart.
My dad also says that's pretty normal for an old truck.