'67 289 timing marks

1967 cougar 289 cu

In the early stages of the renovation.
Installed new dizzy and looking to get timing set.
I understand 11-13 degrees is often a sweet spot. I’ll also use vacuum gauge to assist
Question is
I cleaned the harmonic balancer best I could
I see TDC top dead center of course then 4 lines.
The lines aren’t labeled.
Increments of 2?
2,4,6,8 before TDC??
Thanks
Mark

Might be easier to just order new timing tape to stick on the balancer.

Thanks for the suggestion. If I knew what the marks indicated I can get it timed. Or get a timing light that allows me to set to specific timing on the dial.
Once it’s set I doubt I’ll move it again.
If anyone knows the index let me know.
Thanks
Mark

The '67 factory manual shows them as 3, 6, 9 and 12. The numbers are at the forward side of the timing mark lines.

Perfect. Thanks!