Slant engine prob.

Hello,

I have a Plymouth Valiant from 1965 with 225 slantsix.

To my problem, I have changed wire harness in the car from "Keep It Clean Wiring", becouse the old one was very bad.
Now when i start the car, it cranks and try to start, have had it sound like it started, but when i release the key, the engine stops.

I dont know much about the car, but iknow it has electronic ignition as i was told by previous owner.
I have changed ballast resistor without any change.
I have spark and fuel and changed vacuum hoses.

Now im out of ideas, do you got anything i could check or try out?

(Added some images that shows some of what i have and the manual to wire system)

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