Cuda overcharging? Please help...

Another thing I noticed is that when the turn signals are on the voltage gauge needle moves in sync with the blinker...

I took all 5lbs of electrical tape off the wiring and discovered that the wires from the the ignition, regulator, ballast, alternator, and the bulkhead were all bare and twisted together... Obviously the monkey job they did twisting the wires together isn't getting the best connection, but is that how it's supposed to be? I'm a complete n00b when it comes to electrical and have no wire diagram to use as a reference :( There's also a plug that I have no idea where it goes that comes from the ignition and the ballast... It's worth noting I have to start the car via push button...

I'm not too concerned about that right now though... I would just like to get it charging right so I can move it safely. What I don't understand is why (regardless of what's causing the overcharging) does it only do it when you give it gas? You'd think it would do it at idle too...

Here's the ignition with the mystery plug, and then a pic of all those wires twisted together... :(