No spark

I need some help to chech what and where to check for what. I have done a conversion to double barrel and had done the whole car (suspension) and all that jazz, had to replace a drive ons the distriburator and know the car won't start, everything is set to the correct firing point. I have tested the sparpulg to see if there is firing, but none - could it be my coil, how do I check it? pl I need some advice?

[68barracuda]

If you have a multimeter - chheck that you have voltage up to the ballast resistor, and from there to the coil - is your coil wired correctly - negative to dizzy positivelead to balast resistor ? is your points gap set correctly. how did you test for a spark? Is your ballastresistor OK? is your coil OK?