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What spark plug gap for 1955 Ford Thunderbird?

The recommended spark plug gap for a 1955 Ford Thunderbird depends on the engine it has. The '55 Thunderbird came with either a 292 cubic inch Y-block V8 or a 256 cubic inch Y-block straight six. There's no single answer.

You must consult your owner's manual or a reputable repair manual specific to your Thunderbird's engine for the precise spark plug gap recommendation. The gap is critical for proper ignition and engine performance. Using an incorrect gap can lead to misfires, poor performance, and engine damage.