Introduced more than three decades ago, GM's HEI ignition system ... determine what type of module your distributor is running so you can follow the appropriate wiring diagram.

"Why do I want to put some junk GM ignition on my (insert ... to convert to a standard four-pin GM HEI module. We've included a simplified wiring diagram to show you how it all comes together.

In a hobby where its members lose sleep over date-coded blocks, factory chalk marks, paint codes, and broadcast sheets, putting a GM-style ignition ... wiring a snap. Moreover, the HEI module's ...

This challenge led GM engineers ... to perform an HEI conversion, including the following: Adjustable vacuum advance with a range of 0 to 22 degrees A new ignition module with wiring harness ...