How do you find number one firing on a 454 distributor?

To find the number one firing position on a 454 distributor, first ensure the engine is at top dead center (TDC) on the compression stroke for the number one cylinder. You can do this by removing the spark plug for the number one cylinder and rotating the engine until you feel air pressure or see the piston reach its highest point. Once at TDC, the rotor of the distributor should be pointing directly at the terminal for the number one cylinder on the distributor cap. This indicates the position for firing.