74 Dart only starts in neutral

Hey guys,

Another issue has come up on my 74 Dart 225. Auto trans . Untill yesterday I had no problems starting the car. Then I turned the key and nothing. I tried it a few times and it did start but its intermitn. However it does start no problem if I put it in neutral. Ignition switch? N safety switch? Starter relay?
George, you inbox is full. Have I asked you about a 74 service manual?