(FOUND) Correct 1968 340 Harmonic Balancer

Thank you all for all the replies. What I have here is a 1971 340 motor with a 1971 timing cover and water pump, along with a 1968 harmonic balancer hence the timing mark is on TDC but the stroke is not. I never really paid attention to it until brian6pac sent me the pictures simply because I thought this was a 1971 balancer which it is not. Now that I know what I have here I can go ahead and make my changes and get this motor ready for the 68 Barracuda. Once again THANK YOU ALL mystery solved.
Bob