No spark 67 valiant

Hello! My name is Krystal. My car 225 slant 6 started fine one morning I drove it ,seemed ok maybe a little hesitation but I figured it was cold. I tried to start it 3 hours later and it just kept turning over...
We have replaced:
Spark plugs
Ignition coil
Condenser
Capacitor
Distributor cap and rotor
Ballast resistor
Points and contacts cleaned up
I think that's all.
Still no spark..
Where do we need to focus next? Please help
TIA