1969 340 is down

Just a quick update....engine is out and I intend to put a spare 1969 340 engine in for now. When time allows I will definitely get into the hurt engine as it is numbers matching. Problem was I purchased the car with the understanding that it was rebuilt engine and it went like a scalled ape. Didn't abuse it but used it. Then all of a sudden a noise and loss of power. And this is what I found so far. My quick fix is replace with spare engine and enjoy the summer.
Thanks to all and I will update as I go.