Alternator

The instructions say to hook the one field to a ballast resister that leads to the + side of the coil..


NO

The field and regulator "I" (ignition) terminal must hook BEFORE the ballast, on the IGNITION SWITCH side of the ballast. That is the way it's wired from the factory

Look at the simplified diagram I posted earlier. The dark blue "ignition run" (Mopar calls it IGN1) comes out of the bulkhead connector, terminates at one end of the ballast, and one way or the other, branches off and feeds "other components." This varies year to year but generally is

of course the ignition (ballast)
the regulator IGN (I) terminal
the blue alternator field

electric choke heater if used
idle solenoid if used
smog doo dads on some year models


Also, and there's many threads on this, it's very important to be sure this dark blue feed is not suffering voltage drop, because not only does it power the above "stuff," it's also the voltage source for "voltage sense" for the regulator. If that point out of the bulkhead is low, the regulator compensates by jacking up the alternator output until it comes "up."

If you can post the specific link to your ignition system destructions, that might help as well