What type of 440 is this? (Pictures)

Well the thing is the sixpack rods should have made it externally balanced..................

Should be I agree 67Dart. As far as I could tell the engine has never been molested. Std bore, had a double roller timing chain and gears with the pentastar, windage tray, head gaskets were the steel shims with the pentastar on them. I thought when I saw the thin balancer I was doing pretty good with a forged crank. It threw me off with the heavy rods.