Ballast resistor

Hey folks,
I will be doing an ignition upgrade from points to electronic on my 67 barracuda 273 V8. I have the ecu and dizzy, but need to know if anyone knows what Ballast Resistor I need. Part number from O'Reilly's or Mopar would be helpful. I got this dizzy from a FABO member, but no ballast resistor.

Thanks,
John B.