Disconnect it, I think that's not a stock 1200 part

Ok I spliced the wires from the voltage regulator. It seems better but I still have a miss fire. I noticed when I hook up the battery there is a clicking sound even when the ignition is off. It bolts right next to the horn on the driver side. It has four wires going into it. It has red,yellow,black and blue wires. It seems to get warm when the battery is hooked up.

See Post #11 of this discussion (this is Post #25)

What wires do I cross to make it charge correctly?

The 1978 USA B210 alternator has a built-in regulator. So if you use it in an older car - say a 1972 B110 or a 1977 B210 - which has an external regulator it doesn't work correctly. Apparently it won't cause permanent damage

The solution is to unplug the regulator (and leave it disconnected) then cross two wires so it will charge correctly

That definitely causes problems!

I still have the voltage regulator hooked up. Could that be a problem?

Ok so I got all of the lights to come on. Everything was ok until I put the belt on and powered the alternator. Now that the alternator is hooked up my ignition has a consistent source of power even when the ignition is turned off. It has a obvious miss fire and my tach is going crazy. Any idea's???

So all the other problems are fixed now?
* Oil light now goes off when engine stops
* Brake lights now go off
* Fuse no longer blows out

The headlights have their own fuse, the 'H' fuse of the Fuse Box, so I would check that now. With switch pulled all the way out, does the fuse have 12V on both ends of the fuse?

Which lights do you mean by "marker" lights? Datsun calls the side reflectors that, but others call the front and rear running lights "markers", depending on which region of the country you are in ...

Right on thank you. Your help is highly appreciated. Everything worked fine prior to the swap. All of my electric system was perfect. So I'm just not sure why the front lights don't have power. My turn signals light up and work on the front. Just no marker lights and headlights.