74 dart can’t get a spark

See if the engine will start and run holding the key in the START position. If it will, the ballast resistor is probably bad. It won't hurt a thing for a second or two.

Have you actually used a test light to determine your lack of power, or is it just a guess?
It won’t start at all just cranks and cranks. I pulled the ignition coil plug from distro stuck a screw driver in it put the chord next to it and nothing.