Using points, no spark

If the condensor is changed out and it don't help.
check and see if you have power on both sides of the ballast resistor when the key is on? you should have power on both sides.
Make sure you put the rotor back on
:yep I have forgot to put the rotor back on:#-o
then put the dist cap back on and stick a screw driver
in a plug wire and see if you have spark jumping to any ground like a manifold
be sure there is no gas anywhere.and you will need some one to use the key to try and start the motor
If there is no spark your coil may have went out on you.

like cuda65vpt said, this has happen to me too,
but I have had a coil go away on me also.