This tech article points out some advantages for a High Energy Ignition system, and guides you through the process of installing a distributor for Chevy Cars. - Super Chevy Magazine ...

Starting with the number-one wire, follow the firing order around the distributor in the direction of rotor rotation. For example, a Chevy V8 would be 1-8-4-3-6-5-7-2 in a clockwise direction.