Wiring Issue Headlamp not working Continued...

ricker4444 said
I show power at the ammeter goin in on the red terminal and power going out on the black terminal next to it.

Black is a connection to the main splice where the battery feed joins the alternator and main feeds.
Both sides should always be hot.

ricker4444 said
There is power on the headlight switch at B1 and B2 before I plug it in. I am not getting any power to the foot dimmer or coming out of X and Y which apparently feed the headlamps. I have zero instrument lights and no headlights.

This is a clue that there is a poor connection.
Power is connecting, but when something is turned on the voltage drops to near nothing because the electrons can't flow through the resistance.
It's like having a clogged feed in a water line. When the faucet is off, there is full pressure there. But open the faucet wide and there's no pressure and only drop comes out.

ricker4444 said
I also have dome lights but they do not shut off when the door are closed.

One of the dome light wires is grounding.
The dome light is always hot. They turn on when any switch on the return wire connects with ground.

^ That's a schematic of how it works

Your 67 fastback's main circuits and connections look like this