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On a 70 RR. What does the ground wire that connects to the steering column attach to? I ask because mine attaches to nothing....

Yeah that's how it is now... I was just trying to cut down as much as possible flowing through the bulkhead.

70 roadrunner.... If I run an 8 gauge wire from the alt (batt post) to the starter relay (batt post) with a 12 gauge 30 amp fusible link. Then another 8 gauge wire from the starter relay (batt post) to the positive battery terminal again with a 12 gauge 30 amp fusible link I should be good...

Actually, the difference between 5 and 20 isn't as much as you might think. If my math is right, at 900 rpms, that means the spark is happening 2/1000ths of a second sooner at 20 versus 5.

What made you change your ignition in the 1st place? Just curious...

Check fusible link at the bulkhead connector. Then the next thing I would check would be the starter relay. Use a light or meter to trace where you have power and where you don't. And trace those two random wires you connected to see if they do in fact belong together.

Try disconnecting all of your bulkhead connections under the hood and reseat them for grins and giggles.

When you say dash harness... could you be more specific? Is your ammeter still connected or have you disabled that? Did you check the bulkhead connector for any funny business going on inside that? As wilerrobby suggested you probably have a wire with current touching ground somewhere...it...

Red's right. I ran around that way for a year with a ground there. Not because my NSS was bad but because the rubber boot was hardened and kept falling off. Finally got a new one and removed the ground.

In gear...Auto or Stick? If auto...TC could be causing this.

http://www.moparmusclemagazine.com/techarticles/body/mopp_1110_ballast_resistor_guide_ballast_blast_off/viewall.html

Just pull off and reseat the bulkhead connections. Check for oxidation. If they are oxidized spay with electronic cleaner, scrub with a wire brush, put some dielectric grease on and reconnect. Also check coil connections, battery connections etc...

What he said. You probably just bumped something and now the connection is loose or oxidation is now preventing proper contact.

A bad ground will cause this too.

If it is showing full it may be a cracked wire coming from the sender to the dash grounding out somewhere along the way. My money is in the trunk.

Clean your bulkhead connections for grins and giggles. That would be the mass of wires that connect to the firewall. Remove them....spray metal contacts with electronic cleaner and brush the metal contacts with a toothbrush then reclean with electronic contact cleaner. If you have dielectric...

You said you cleaned the bulkhead connector... I would pull them again and reseat them and see if you get her going.

Pull your bulkhead connector and clean the spades real good.

What is you ignition system? Stock? MSD? I assume if stock being a 72 you at least have electronic ignition? Sounds electrical in nature.

I bought a cheap rebuilt alt from autozone in a pinch a couple of years ago.... It is still doing just fine. I'm not gonna fix it if it aint broken.