changing from points to electronic

Are you serious or being sarcastic? Say I used an MSD 6A box, would that negate the need for the resistor and ECU? Or does the box simply amplify the signal that's sent out by the ECU?

Not being sarcastic at all. Using a GM HEI module in place of the mopar ecu does not allow the elimination of the ballast resistor. An MSD box is a completely differnt beast. It will trigger off the points or magnetic pick-up in the distributor and fires the coil directly from the box. The ballast resistor is not required with an MSD.