[floridasteve]

I am not an expert by any streetch of the imagination, but my first thought was that there was no broken bolt. I cracked the rear cover of a 67 Camaro 10 bolt posi rear I have in the garage (future install). Sure enough it is a pin and not a broken bolt, you should be fine with it like it is. I have put a photo in just to show you mine.

I hope this help ease your mind.