Crap! Have the car about 3 weeks
This problem could be about anything
wiring problem, meaning anything in any part of the ignition harness
or a problem in the charging line from alternator through the bulkhead, ammeter, and back
bad alternator
bad regulator
What do you mean you "removed the positive lead?"
Pull the green field wire and ground that alternator field terminal. Run the car, see if it charges, and check voltage right at the alternator output stud--the big stud/ nut connection
If this does not cause a charge condition, turn key to "run" and check for voltage at the blue field terminal at the alternator.
If no charge, most likely the alternator.
You should make an effort to learn to troubleshoot this stuff. Chryslers charging systems are one of the simplest on the planet, and are easy to learn to deal with.
1---Get yourself a service manual. If you don't want to buy one, you can download a couple for free:
[ame]http://www.abodyjoe.com/pictures/Misc.%20car%20info/70%20Dart%20Challenger%20Serv%20Man1.pdf[/ame]
http://www.mymopar.com/downloads/servicemanuals/1970_Plymouth_Service_Manual.zip
2---Get yourself a 12V test lamp, an inline spark tester, and a multimeter. Go to Radio Shack and buy a couple of bags of clip leads