Early 72 340, is this one of the de-tuned ones?

Professor Fate said
I'd be more worried about that cylinder ridge...

Professor Fate said
The only things they really changed were the compression ratio, went to a cast crank w/external balance, and 1.88 intake valves/hardened valve seats. Nothing that couldn't be addressed during a rebuild.

Well I dug through the bin of parts for this motor and found the external balance, so I am learning!
thanks.