Dead ignition

Here is the story… When I got the car it ran ruff, as in you had to keep the gas pedal half down to keep it from stalling out. So… I drained the gas and put on a new Holley 670 street avenger, because the Eldenbrock 600 preformer was toast and the choke spring was broke. It ran better… I then noticed the plug wires were arching and needed to change out the plugs anyway, so I did that with a cap and rotor button. I then go to fire it up nothing…. Replace the ignition switch…. I ran for a sec and then nothing again, at least the starter turns over.