need 1974 ford 360 wiring and vacuum diagrams or help Jul 01, 2009I am helping our neighbor with his 1974 ford f250 with a 360 engine. He let someone use it 4 or 5 years ago and it came back with a engine fire. All the wiring and vacuum lines are burnt up on it. Now it has a new carburator, plug wires, battery, and the wiring is all replaced but there is a plug that has a blue wire coming from the firewall and a white with black stripe wire coming from whatStatus: OpenAnswers: 4 Ignition coil wiring diagram 1971 ford f25 ,360 - Fixya I don't have wiring diagram for that year. I don't mind talking to you. The positive side of the coil gets voltage from ignition switch, the negative side of the coil goes to distributor and ignition points on a points type system. Some makes and models, when cranking, everything gets full battery voltage.