Vacuum Advance

[Charger Fan]

Looking to find out how many degrees of vacuum advance was a stock distributor on a 1973 440 HP set at from the factory?

 

[Vaanth]

Looking to find out how many degrees of vacuum advance was a stock distributor on a 1973 440 HP set at from the factory?

From the factory service manual for a 1973 440 High Performance engine, distributor number 3755157:

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[pnora]

Looking to find out how many degrees of vacuum advance was a stock distributor on a 1973 440 HP set at from the factory?

Get a FSM out and do some reading.

 

[R413]

Remove the vacuum advance and there is a vacuum value stamped on the arm. That's what you have. Forget the book, parts get swapped around.