harmonic balancer cast vs forged

Naplm00 said
My original timing cover on my 64 is bent, I have a late model timing cover just like the one pictures above.

I'd really like not to put my own marks in the damper. Anyone know what damper listed will work with later model covers ?

No, but it's pretty easy to find TDC using a piston stop in #1 spark plug hole. A little punch mark with a chisel or punch and you are good.
When I put my 1964 225 together, the original dampet mark was only off 1/32".