whats the little round thing that sets on top of the valve spring 
http://registry.gmenthusiast.com/images/acbigshow/personal_pic.jpg
 
I think it's the valve retainer.  I am not 100 percent sure though.
BTW is that pic supposed to be your sig or what?  I thought it was of the valve thingy.
 
 
found out what its called    its a    VALVE  THROTTLE CAP   theyre 7.15 a piece  and you can only get it from a dealership