The firing order for a Chevy Caprice I with a 5.0L engine is 1-8-4-3-6-5-7-2. This means that the spark plug wires should be connected to the distributor cap in the following order:
The distributor cap is located on the front of the engine, near the top. It is a black plastic cap with eight terminals. The terminals are numbered 1-8, corresponding to the cylinder numbers.
To connect the spark plug wires to the distributor cap, simply insert the end of the wire into the corresponding terminal. Make sure that the wire is securely seated in the terminal so that it does not come loose.
Once all of the spark plug wires are connected, you can replace the distributor cap. Simply snap the cap back into place and tighten the hold-down screws.