I used a GM hei module and a ford e-core (square) coil....it all runs on 12 volts, and provides much hotter spark..is compatible with the Mopar distributor.....works fantastic, looks cleaner than the mopar box too. O.G.
84 D150 440/727 79 /6 swb D150 1964 A100 window van. Just because it has spark plug tubes doesn't mean it's a Hemi.
If ya haven't been there, ya just wouldn't understand.