75 Dart /6 wont start. Electrical?

Compression, fuel, and spark

Need enough compression to run, problems including timing chain slipped, fuel washed down cylinders from such things as a leaking fuel pump or flooding carb, low compression

Fuel. Fresh fuel. Did the neighborhood kids "fill you up?" Is the fuel stale? Plugged?

Spark. Good spark, in both "start" and "run" and AT THE CORRECT TIME