Do you just have the electronic distributor?
Then you will need the two pin ballast resistor to go with electronic ignition, an ECU box, and the wiring harness for the box...
There are 5 wires on the harness.
Two obviously go to the two way plug for the distributor...
The blue wire goes to the input side of the ballast resistor (I like to use a piggyback connector for easy install and removal if ever needed...)..
The black wire goes to the negative terminal on the coil...
The green wire is for 4-pin ballast resistors and you just clip it off and throw it away... (Or save the wire for future use...)
Here's what the harness looks like:
Mopar Performance Control Unit Wiring Harness Kit
Here's what the complete kit comes with. You can look at the picture and see what you need:
Mancini Racing Electronic Distributor Conversion Kit