To find the correct firing order and wiring diagram, you MUST:
1. Identify your distributor: The distributor cap will have markings that may give clues (sometimes a casting number), but visually inspecting the distributor itself and its internal components is ideal. Take a clear photo to be sure.
2. Locate the engine code: This code, usually stamped on a pad on the engine block (often near the distributor), will give you the exact engine specifications. This code is crucial for finding the accurate information.
3. Consult a Ford shop manual: A shop manual specific to a 1975 Ford vehicle with a 302 engine is your best resource. These manuals will have detailed diagrams showing the firing order and how the spark plug wires are routed. You can find these online or through auto parts stores.
4. Use an online database: Some online databases specialize in automotive information. These often require you to input the engine code and other vehicle details to get the correct firing order.
Without the distributor and engine code, any diagram provided would be unreliable and could damage your engine. Attempting to wire it incorrectly can lead to misfires, poor performance, and potential engine damage. Take the time to identify your specific engine configuration for accuracy.
