Duster won't fire in cranking position.

gliderider06 said
Thank you! I do have a factory diagram, but it doesn't show the ignition circuit like this.

Two reasons.
One - the diagram in the back of the electrical chapter is just that, a wiring diagram. It shows every wire and connection. The tech was expected to use it for locating wire connections, or when neccessary, to make a schematic. It's actually not that hard and you learn a lot sketching or tracing the circuit you're interested in.
Electrical Wiring (Session 247) from the Master Technician's Service Conference

Two - Explanations for how individual circuits work are located within the chapter. Additional explanation can often be found in the Master Technicians Conference.
Master Technician Service Conference - Chrysler's Training for Mechanics
The diagram posted above is for some company's modification. Factory ignition is never powered through the fusebox.
@67Dart273 has provided an excellent description of how the ignition is wired in post #11.

gliderider06 said
It only gets spark in the RUN position. Nothing in the START position. Am I missing something?

See post #11

gliderider06 said
I thought that a 4 pin ecu needed a 2 pin ballast, and a 4 pin ballast needed a 5 pin ecu.

Basically, but the logic is reversed. Its the early ECU that needs the second ballast resistor. The original 5 pin ECUs needed their power externally regulated. (If you're not sure which is which, the second resistor is 5 ohms)

Rainy Day Auto said
You might have a bad ballast resistor

gliderider06 said
I swapped it and still does the same thing with both ballast resistors. I even ran jumper wires to eliminate the ballast. No luck with it either.

The resistor does act as a connection to the ECU. But because it is sparking in Run, the resistor must be OK. The purpose of the 'Ignition 2' circuit is to bypass the ballast resistor during start so the coil gets unreduced battery power.