The firing order of an engine is the sequence the spark plugs fire. On engines with a distributor, the firing order is determined by the routing of the spark plug wires from the distributor cap to the spark plugs in each cylinder. When the piston is at top dead center (TDC) on the ...
Newer variants of the 454 use aluminum heads but share the same cast iron block. They also share the exact same displacement and bore x stroke of 4.25″ x 4.0″. Firing order for the Chevy 454 is 1-8-4-3-6-5-7-2. Early versions of the 7.4L V8 were able to deliver 360-450 hor...