Ok, good information!

let say you have 15* of initial timing with the distributor vacuum advance hose removed and plugged. Then the weights and stop would allow for an additional 20*, that would give you a total of 35* total, and all in at a certain rpm based on spring tension. That said, how much would the vacuum add to the initial timing and cruise timing? did Chrysler set the vacuum advance to add an additional 10*?

So at idle with my above remarks, initial timing plus vacuum advance would be 25* at idle, and say 40-55* (high vacuum/low load) at cruise or there around. Would that be correct?

This what I have always thought, but not sure.

Thanks, Mark