figuring out advance timing

Rat Bastid said
Yup, a Pontiac and a chrysler take the same timing curves.

Not.

If you have to Jack that much timing into the engine to get it to idle you have a piss poor engine build, piss poor combustion chambers or both.

Or SERIOUSLY LOW cylinder pressure. There was a reason Pontiac had almost ZERO street cred off the showroom floor during the muscle car years. They were slow.