1. Firing Order: This is fundamental. The 289's firing order is typically 1-5-4-2-6-3-7-8. This determines the order your wires need to connect to the distributor cap and spark plugs.
2. Distributor Cap: Start at the number 1 cylinder's terminal on the distributor cap. This is usually clearly marked.
3. Plug Wire Routing: Following the firing order, route the wires in a roughly clockwise direction around the engine.
* Keep it neat and tidy: Avoid excessive slack or sharp bends. Sharp bends can cause premature wire failure.
* Heat shields: Keep wires away from exhaust manifolds, headers, and other hot engine components.
* Logical path: Aim for a relatively straight path from the distributor to each spark plug, avoiding unnecessary crossings. The goal is to minimize length and potential interference.
* Hold-downs: Use wire retainers or clips to secure the wires and prevent them from rubbing against other parts. Many stock locations exist for this purpose.
* Avoid sharp bends near the plugs: This is a common point of failure. Allow sufficient slack for the engine's movement.
* Crossings: If wires *must* cross, do so at a wide angle to minimize the chance of shorts. Consider using separators to maintain distance.
Visual Aid: A good visual aid is extremely helpful. Search online for "196x Ford Mustang 289 spark plug wire routing diagram" (replacing '196x' with your Mustang's year). Several images and diagrams should appear showing various routing options. These diagrams will often show you the optimal paths and locations for wire clips.
Important Considerations:
* Year of Mustang: Minor variations exist between model years. Using a diagram specific to your year is crucial.
* Modifications: Aftermarket parts like headers or modifications to the intake manifold might require adjusting the routing.
* Wire Type: High-performance wires might have slightly different routing needs.
In short, route the wires neatly, following the firing order and keeping them away from heat, using existing hold-downs and adding more as needed to create a clean, secure, and functional system. Remember to always consult a diagram specific to your vehicle's year and modifications.
