6. Cylinder duster is now a 340 ignition issues wants to start when you let up on the key
This simplified drawing posted earlier is based on the factory diagrams.
The '73 - '76 diagrams are often broken up over several pages. When trying to follow a circuit, its worth colorizing or even redrawing just the circuits of interest.
In the Mymopar link for 1974 master Technicians Conference, there is a booklet and filmstrip about reading the diagrams.
Basically when it says J3-14BR, 14 is the SAE wire gage and BR is the color.
J5 18 BK/Y* is Ignition wire 5, 18 gage Black with yellow stripe
CE 37 = Connector Engine compartment 37 and has a seperate drawing in the service manual.