HELP!! with my 75 Dart

I looked at that as well.. Distributer looks fine.. Correct me if I'm wrong..the engine wouldn't run or stay running i should say..if a needle valve is missing? Right? It's the air adjustment valve..

If you are talking about the air/fuel idle mixture needles, they can run without one of them a lot of times.
They will run like crap though.
I would be all over them for that ****.
For 300 bucks you would think they could find one.

Check or replace the distributor cap and see how it acts (but with the missing needle back in it):D
A hit like that can easily crack a cap.