CE replacement block or date code correct block

[jasonL78]

My 68 L79 had the original motor replaced the day the new owner picked up the car. The casting on the block is actually september-67 and has the correct CE8####### on the engine pad so what category would my car fall into. I have spoke with the original owner and he told me the day he picked his new car up the motor went. He didn't have the paper work for the CE replacement. So is this considered just just a CE replacement with no paper work?????