Let’s start by looking at the evolution of the GM High Energy Ignition (HEI) system. This system became available as an option in 1974 and was standard in all 1975-and-later vehicles, with the ...

Ignition systems have one of the toughest jobs under the hood of vintage Mustangs. They handle the very precise job of firing spark plugs in concert with the engine's crank and cam timing events. It's ...