Need some help...

I have POINTS IGNITION

I’m trying to make a
Simple starting circuit with a ‘71 barracuda wiring harness in my ‘73 barracuda. I have factory key and ignition switch.

I’m using a two pin ballast resistor.
I have a new neutral safety switch and new safety switch harness
I am using an aftermarket shifter.

This is what I have done

On the outside of the firewall at the “start” terminal in the bulkhead, I have a wire going to the “start” terminal on my starting solenoid.

In the “run” terminal on firewall side of the bulkhead , I have a wire going into the ballast resistor, Then out of the ballast resistor to + pole on the coil.

This is what’s happening ;

I have power to coil in “run” mode but when I roll the key forward to “start” it cuts power to the coil. It will turn over fine but it won’t fire. At this point I have no spark

But with the key In “run” position I can use an external starting button on the solenoid and it will crank and run

I have a new harness for the neutral safety switch and a new switch in the trans. I’m missing something. Maybe it’s not getting ground.
Is there supposed to be a wire at my shifter that grounds the system in park?

Thanks !