Engine ID

Howdy Folks! It's been a while! I recently purchased a 360 engine and a 727 Torqueflite. I'm trying to verify my engine ID. I believe it to be a '73 360 regular fuel. I'm sure someone can tell me if this is correct. The number stamped below the left side front of the head is: 3W 360 R 4151.
Author: greyghost