I have a 347ci motor and my ASP pulley came off what are the chances of my motor been out off balance???

 

I do not know but did it do any other damage? I think you would have to replace the pulley and start it up to tell. I guess you could put a dial indicator on the shaft and turn the motor over to see if it could of bent the shaft. There is not much of the shaft sticking out. That crank looks very strong. Hope you did not hurt it.
I have heard of a couple of people with pullies coming off.
Bill

 

I stared the car and it sound ok but im going to take my heads off just to see if it ok !!!

thanks