If the black box was only to control the FI, then I would rip it out and throw it in the ditch where it now belongs. All you need do is find the 12V source that feeds the box, and use that as your coil positive going to the ballast and throw the box in the ditch. It's not doing anything anymore.
lol... you say it just how I feel. When the weather turns better for us, I plan on trying what you said. I ordered a new points distributor. Thanks RRR