Need some electrical help with my ‘68 Plymouth Valiant 100

Good for you! I do the same. I hawk ebay for old books, manuals and NOS engine and electrical parts, because nothing is made in USA anymore and the quality is questionable at best. With parts, I look for brands like Echlin (NAPA), Michigan, Sealed Power, TRW, Pacific, Hastings and on and on. The box has to be old and yellowed and say "MADE IN USA" before I pull the trigger. lol
That is good to know! Thanks for mentioning these brands I’m going to reference this for my parts. My uncle is shipping me an alternator he got from a duster or possibly a vailant. He said it should work in my car, but I’m not totally sure on it. I gotta get a regulator too. Would you say rock auto, classic industries and summit are the best place for parts online?