check to make sure that your ign fuse is good and that you have 12 going to the resistor wire and 7v going to the + side of the coil from the resister wire. Also check to see if you have 12v coming from the starter solenoid via a yellow wire to the + side when cranking.
If all that checks out. Check your points and make sure they aren't welded together. Pull the coil wire from the distributor, place a bolt in the end and drape it over the block so its hanging about a 1/2 away. Crank your motor and see if it sparks.. Spark = dist good no spark may be a bad coil or welded points.