I have a 1978 that the engine was swapped sometime in the past. I am trying to get as much info as possible on the engine itself. The stamp appears to be "CC7342". I have not been able to find any info on how to decode this. Hoping someone can point in the right direction.
Here is the stamp from the passengers side, just in front of the head:


And from the Drivers side just behind the head:
GM 5.7L G
SGI

 

Found this: https://itstillruns.com/decode-gm-engine-block-7517566.html