hei ignition coil on mopar

The 4-pin HEI module is older. A simpler, cleaner way is to use the 8-pin HEI module w/ GM "external coil" that connects to it. That also allows spark timing control down the road. Many posts on FABO w/ photos. TrailBeast sells a kit w/ new parts for $99 or junkyard ~$15 like I did. If JY trip, also grab the knock sensor and module, 85-95 GM trucks w/ TBI. The Summit coil you show looks like a Ford. The GM is similar but connects simpler. Wow, I see that 73AbodEE beat me to the best answer.