Called on this 69 SS/RS, and talked to the owner's brother. Not very knowledgable when it comes to musclecars, even though he helps run a classic/musclecar business. I asked him for the datecodes, casting numbers, etc on the drivetrain, and his reply was....what are those?

Well, I ended the conversation right then and there.
And yes, there is blue on the engine, and probably a 70's era small block.