HEI conversion question

Your coil will determine whether you need a ballast resistor, NOT the HEI module.

If your coil is designed to use a ballast resistor, it will run hot & probably burn out if you omit/bypass the resistor.

If you want the 'best bang for the buck' with the HEI module, use a modern E core coil such as the MSD #8207 [ no b/resistor needed ].