Have you actually had somebody look at the actual voltage while you are cranking it? Almost sounds like low/ marginal voltage. MSD acts weird with even a tiny bit low voltage. If you have a good battery charger hook it up and put in on boost and try starting the car
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
