Electrical gremlin...I need an exorcist

[Stang951]

A little history first. I reinstalled all of my amplifiers onto a new amp rack in the trunk. The battery and solenoid are there. The only wires that were disconnected during this were the main wire to the amplifier distribution block and the ground cables to the amplifiers. Then I put in my dead pedal and noticed that when I tapped it the car power flickered. I cheked everything, but could not find a problem.
Here's the problem. I get power to the accessories in the acc position of the key. When I put the key in the run position I get nothing sometimes and power to everything sometimes. But when I try to start it all the power goes away. I tried all of the following:
1. replacing the ignition switch.
2. jumping the neutral safety switch.
3. I have the dash out to get to everything easier now.
4. jumping the relay - engages the starter just fine
5. The start wire to the solenoid is not getting any juice.
The car was a 2.3 converted so I think there is an aux gear safety switch for the transmission, but I cant find where it is...
Any help is mucho appreciated....so much for the cruise night tonight.

I have also checked a couple of very hard to read wiring diagrams, and am leaning toward a possible fusible link problem. And when I tapped the clutch pedal by accident the power went away, and then came back.