Start a new thread in electrical for wiring. Ignition to get it started is easy. The rest is a bit more work. What wiring do you need to do? What experience do you have? Can you read a wiring diagram and wire from that?
Do you have the exhaust manifolds? You can have a muffler shop build the rest.
There is a company that sells a
complete exhaust. "Direct replacement" for about $400. Not worth it and may not fit your truck series/305C and etc.