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What is the firing order for a 1977 cadillac 425?

The firing order for a 1977 Cadillac 425 engine is 1-8-4-3-6-5-7-2.

This means that the spark plugs fire in that specific sequence, starting with cylinder 1 and ending with cylinder 2.

Keep in mind that this firing order is specific to the 1977 model year. If you are working on a different year Cadillac 425, the firing order may be different.