MSD Coil replacement

Gee.......now I am all confused. My 318 has a new ballast resistor and ignition module.....and everything else electically is stock. I changed those just because. I haven't looked but am pretty sure car still has points. It is a 1974 model Duster. Haven't had the car long and was going to change the coil while changing the intake. But now I am not sure. Electircal work....and trouble shooting scare me to death. So now I don't know what to do.