1971 Hornet SC360 Not Charging and No Cluster

It was sitting for a little bit and needed a tune up, (New plugs, wires, cap and rotor, reset the timing and adjusted the carb.

So while driving and messing with the carb on my test drives the car died . got it jumped got it back. then noticed the Alternator was not Charging.. so with everything being original I had it rebuild after doing some google research. Put the new alternator on yesterday and still nothing. And now I have noticed I don't have Tach, or Speedo on the dash. some more Google research and got new voltage regulator from napa and plugged it in. Still nothing.. The Alt light on the dash is bright red and stays on when Car is running, voltmeter says battery is at 12.6 while running, Alt light will dimmer down when rpm ramp up but is still on. I don't know much about the wiring of these cars and cant find anything on the hornets. Would Greatly appreciate any help guys

As old as these wiring harnesses are it wouldn't be unusual for a wire to have it's conductor disconnected from a lug but still have the insulation intact. That's just speculation on my part though.

You probably have the Motorola charging system. There are several connections that need to be made.

The large red wire from the alternator isolation diode output terminal connects to the battery side of the starter relay.

The "Regulator" terminal is the single connector with an orange wire. Be sure that post is insulated from the case. Sometimes when they're rebuilt they're not done correctly.

The one that is most overlooked is the field excite winding. That is the two conductor connector (usually 'L' shaped, older cars have two individual connectors) with a green wire and a black wire. The black wire connects to the alternator ground terminal, the green connects to the field terminal.

I'd look over all the terminals and connectors to be sure they're not covered with corrosion.

The dead cell could be just a big resistor preventing full alternator output.  

Symbol correction.