Yep welcome to the busted Firecore Junk Distributor club - Had three do the exact same thing - counter weights came loose and all hell breaks loose inside - one cost us an entire engine
We use only MSD distributors now - never have had an issue
On the one that hurt an engine, what happened?
Now I am a little worried, as my one valve cover that the distributor hit was loose, and I have not pulled the plugs and covers and rolled the motor over to see if the valvetrain is alright. I assumed it was ok, but I probably should do more inspection. If it hurt somthing bigger than the parts themselves, Firecore will hear about it big time.