I hid the 4 pin HEI module and heat sink under the factory coil mount. I bypassed the ballest resistor with a soldered piece of wire in the back. It runs very well. Also, I run 0.045” plug gap. My coil is a MSD blaster coil but the one that can be mounted at any angle. The standard one need to be nose up or it started to leak oil. It took 2 coils leaking before I figured it out. (I believe it ends in 11 part number- 8211 but I may be wrong.) As for purity…. Mopar ecu was a game changer but honestly the GM 4 pin is better. You just need to make sure you run a heat sink and die electric grease between the two- it helps dissipate the heat.
Syleng1
