I"m getting 20 at the larger stud on the alternator. would that mean I have yet another bad voltage regulator? That wouldn't be the reason my headlights aren't working would it though?
TWENTY??? You might have a failed master splice, the one I just mentioned. Here is what you do.......
Disconnect battery ground, and disconnect alternator Take an ohmeter and connect one end to the alternator terminal, and the other to the "big stud" on the starter relay. Should be zero ohms. Wiggle the bulkhead connector. If you don't get "anything" it might be in the bulkhead connector, it might be in the master splice that I mentioned above. You MAY have blown up something, headlights? Relays?
Don't you have a service manual? Go download one, for free, at MyMopar You may have to settle for Dodge vs Plymouth, or vice versa
Checking power out of the light switch may not tell you much as you MUST LOAD it as the meter is not a load. You need something like an old stop / tail lamp socket and bulb so you can put a load on the lights circuit under test