1967 Barracuda 4 Speed 273 back fire issue

Well I unplugged just about every electrical connector under the hood and plugged them back in nice and tight fired up the iron lady and had her running really good. Was actually thinking I could take her out for spin next thing it started back firing again sorta Dr. Jeckle & Mr. Hyde deal but I noticed that the ballast resistor started to smoke and I tried to turn off the car but with the key in the off position it would not turn off ended up pulling the cable off the coil. Checked the points they were fried again and the coil was really hot.