Bill and Sam, thanks for your input. This subject has come up on numerous occasions over on Team Chevelle and my above response was the general consensus of the feedback provided. Also, if I recall, there was some sort of "GM Service Bulletin" quoted by a TC member stating this actual fact. Furthermore, there seemed to be evidence from people who had experienced this 'way back when' that the procedure could in fact be different from dealer to dealer.
I am not in a position or have any kind of evidence to confrim this. My CE block has the VIN on it, but I am not in a position to confirm who and when it was stamped, and frankly, it doesn't really matter to me.
Could be one of those "no concrete consistant evidence available" type of circumstances
Additional comments and input obviously more than welcome