What are these block stampings?

[Petes L48]

Early 67 MU block, not original to car but from same plant and week mine was built (LOS 11B).  I believe the engine build date was in mid August.

http://s911.photobucket.com/albums/ac316/RAP617983/Camaro/67%20block%20stampings/?albumview=slideshow

 

[JohnZ]

Early 67 MU block, not original to car but from same plant and week mine was built (LOS 11B).  I believe the engine build date was in mid August.

http://s911.photobucket.com/albums/ac316/RAP617983/Camaro/67%20block%20stampings/?albumview=slideshow

 

Those are engine plant inspection stampings.

[Petes L48]

Thanks! 

Any idea if they identified the inspector, or something else like day of the week or what specific area was inspected or?   

[JohnZ]

Thanks! 

Any idea if they identified the inspector, or something else like day of the week or what specific area was inspected or?   

The stamps identified the inspector; most likely just a cursory visual check of some specific area after machining, looking for missing holes, broken-off taps, etc. Not much time for anything other than visual checks at 250 blocks per hour in the Machining Department.