No spark

I'm trying to get my new to me 70' dart 318/904 to start but it's not getting any spark. Is there anything particular to check? I've fiddled with just about everything I can think of. Fuses, ballaster, coil, distributer cap and traced most of the wires. It's getting gas, and cranks fine but it isn't even trying to start...obviously since it's not getting any spark. I am sure it's something stupid that I'm missing like a ground or short but just thought I'd check to see what you guys have to say.