Anybody got a harmonic balancer for a '64 225?

Unsure if the timing marks changed, but that outer ring can slip. My TDC mark was 10° retarded. So the 8° advance I thought I was running was really 2° ATDC. Just something to think about...

But, at the same time, I don't know how accurate new ones even are. Will find that out sometime in the future.

Edit: an unacurate timing mark won't be that big of deal, IF you can find TRUE TDC, and then mark the balancer accordingly.