225 Slant Six Crank but Won't Start (Fuel but No Spark, Dist. Rotor turns)

First question is what do you have for ignition system, IE breaker points, or Mopar ECU conversion, other?

If you don't have a factory shop manual, buzz over to MyMopar and download one free

What do you have for testing?

You need a 12V test lamp, some alligator clip leads, a spark checker, and a multimeter.