Do I have the right harmonic balancer?

Hi guys I'm after some help on the harmonic balancer that my father in law had on his parts shelf, I know that he picked it up with the intent of putting it in his 69' 340 but looking up the part number I'm not sure if it's right. It's a Powerbond PB1004N, PowerBond PB1004N PowerBond Premium OEM Replacement Harmonic Balancers | Summit Racing and looking it up it's for a 72-73 340. I know that the timing mark will be out 90* which...

Do I have the right harmonic balancer?
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