I recently saved a 1979 Camaro Z28 from a grove in Minnesota. The engine is not original to the car and I am trying to figure out what I have. The engine VIN #16S109445. From that it is a 76 chevy built in Saginaw. The engine Code # T0829CSU. From that it was built in Tonawanda on 8-29 and the CSU suffix is a 1974 chevelle 400 block?

My codes are two different years? Can anyone help me?

Thanks