What is the spark plug wire order on a 1974 Pontiac firebird?

The spark plug wire order for a 1974 Pontiac Firebird depends entirely on the engine it has. Pontiac Firebirds in 1974 came with a variety of engines (including V6 and several different V8 options). There's no single firing order.

To find the correct firing order, you must determine the engine size and type (e.g., 350 cubic inch small-block V8, 400 cubic inch small-block V8, 455 cubic inch big-block V8, etc.). Once you know the engine, you can find the firing order in a repair manual specific to that engine and year of Firebird. The firing order will usually be printed on a sticker under the hood, on the air cleaner, or in the owner's manual if you have it.

You can also find this information online by searching for "[Your Firebird's Engine Type] firing order" (e.g., "Pontiac 350 firing order"). However, always double check with a reliable source such as a repair manual to ensure accuracy. Getting the firing order wrong can damage your engine.