Ignition timing for stock cam/heads Magnum 5.9?

The way Chrysler set up the distributor and the vacuum advance is different from others. The vacuum line runs to a ported entry. This means that the vacuum line operates once the throttle is cracked. Not at idle. There could be some vacuum on that line. This is why they tell you to disconnect the line and cap it to set initial timing and then reconnect it on the final step to test for 52*’s max timing.