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No. They were two separate circuits.
The second circuit energized the intake manifold mounted vacuum solenoid in 3rd gear to allow vacuum to the distributor advance. In other words, the distributor only had mechanical advance in first and second gear.
Manual transmissions had a switch built into the case that did the same thing but after third in a 4 speed.
The second circuit energized the intake manifold mounted vacuum solenoid in 3rd gear to allow vacuum to the distributor advance. In other words, the distributor only had mechanical advance in first and second gear.
Manual transmissions had a switch built into the case that did the same thing but after third in a 4 speed.