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

It will work fine with can coil. Put it on an epoxy coil it will over heat coil. In picture above the cross hatch area does nothing, but heat the coil and ballast resistor. The HEI, predicts where to start charging coil, so it happens just in time for use. Keeps coil, ballast, transistor cool, saves alternator draw.