Here it is: http://www.camaros.org/forum/index.php?topic=1635.0I just checked CRG, there was a post entitled "warranty engine" that explained a lot about these engines. Maybe JohnZ will chime in. I don't know how to link.
I mean the person reading the number might be mixing the 2 codes together. Either way, unless we see a picture we won't know for sure if he gave us all what is really there or if they are mixed up.You can't have a combination stamping since they were done at two different times, not at the same time.