Engine decode help

[kenmerr80]

Can someone help me ID what this engine may have remotely belonged to?  My father decided to replace his engine in his old C10.  I gather its a 327.
3858174
pad stamp-FO425EE

On the back is:
         852
H  16   174
    0

Double hump heads and intake 3872783

thanks

[bertfam]

1966 L30 (327/275) with Powerglide and 4BBL carb from a Chevelle.

Ed