Dead on side of the road ! ! ! Help !

71 Charger 440 mopar dizzy orange box msd blaster 2 coil. Car just died going down the road. No spark. With key in run position, Have 9.4 v at dark blue wire at ballast resistor, 7 v at brown wire at coil. Battery shows 12.5v. A spark plug held against a ground shows no spark when cranking. Any idea??? Thanks!!