Voltage regulator problem with 1968 Dart

OK. That's prob not directly related then.
How does power get to the main splice? The reproduction harness heavy black wire? Not sure which wire your talking about, the one that would normally go to the BAT stud on the alternator? That one is Shrinkwrapped and taped off.

Is ignition using points or something electronic? And if electronic - how is it wired? MSD Ready to run distributor with no box, MSD Blaster2 coil wired per MSD directions
I ask that because the original regulator shares the ignition circuit.


What key position when you measured this? When the key is in ACC position


The dome light circuit is always hot. It doesn't go through the key.

Have you noticed when the fuse is blowing? The fuse blows the second the kill switch gets turned on and providing power to car