If there is a wiring circuit issue, replacing parts won't fix it. Use a digital multimeter across battery posts, everything off. Around 12.6 volts is a fully charged battery. Start the engine, take second reading across battery posts, engine running, the second reading should be higher than the first, if charging system is working.
November, 9, 2012 AT 7:33 PM
I did find some alternator specs, 1966 chrysler alternator. Engine rpm@1250, alternator output 13.3--14.3 volts. Check in both places across battery posts and alternator bat terminal. What about external voltage regulator?