I understand how to time a cam , if everything is how it's supposed to be , ie marks all in the proper place .... BUT

I have changed the fiber cam gear on my 216 and it has a different mark location than the old one.
I have checked the used spares I have and they are different to the engine also .

I am TOTALLY confused. This is not how this is supposed to work.

So , my question is this .

Does someone have a link to a tutorial I can follow to time this cam starting from no marks (apart from the ball on the flywheel.)

Thanks for your time.