Damper mark @ dot to dot ? ASAP

The early timing tab is a removable sheet-metal bracket that mounts on 2 water pump bolts on the passenger's side. No reason you couldn't install one of those if you are using the early cast-iron water pump (lower hose on driver's side). That tab should match the mark on your damper. It is small, so cheap to mail and someone here probably can sell one.

As mentioned, you could also re-mark your damper for the driver's side mark on your later timing cover. I did that since I install a later aluminum water pump in my 65.

Of course, all above could be incorrect speculation since you didn't post a photo of what you have.

I also got confused about the cam timing dots. I ASSumed they should line up at TDC #1 compression, and found they aligned at TDC #6 compression. I said WTF until I read "as designed". Good I didn't try to fix the "problem" in a creative way and FU my engine.