Anyone using one of these coils on their A-body???

Stephen Hotz said
Going to run a coil off a mustang for a tfi module as we are running a stock electric dizzy and hei module on the 360 Mag in the Coronet. I know that doesnt help but I know most of my newer coils get 12V to coil.

67Dart273 said
OP needs to specify what ignition he is running. You running the Mopar box? You can get away with no ballast on an HEI module because they work quite differently than the Mopar breakerless. I ran a 4 pin HEI with a bone stock 67 Mopar coil, no ballast

I've "read" where some had used these. Just wondered the benefits, and if they required a ballast resistor.