A ignition control module wiring diagram for 1983 mustang

SOURCE: distributor cap wiring diagram

here is the firing order if the cam is stock.

SOURCE: Need engine wiring diagram for Ford Mustang 95 cobra 302 engine

http://www.veryuseful.com/mustang/tech/engine/

SOURCE: 1983ford mustang ignitionwiring diagram

http://www.autozone.com/az/cds/en_us/0900823d/80/16/71/3c/0900823d8016713c/repairInfoPages.htm

also if you pick a Chilton or haynes service manual they have complete wiring diagrams...

and a lot more info you will find very useful

SOURCE: ignition switch diagram 65 mustang

If its not on the steering column, you can figure it out using an ohmeter on the switch leads. Actually, you could figure out the one on the column that way too! just think about what the switch does in each position and attach wires that do it to the post that does it! IE: starter solenoid wire goes to post that is hot when key is turned all the way to start. Main hotlead is the one that is common to all switch positions. run and accessories is to the post that is hot with key on, accessory only is the one only hot with key turned backwards.

SOURCE: Mustang, 1992 2.3L dual point OBD 1 error codes problem

Have you checked for spark on all 8 plugs? Unplug the exhaust side coil pack and run the engine. Does it run on all 4 cylinders?