Through all of the years we deal with, Chrysler used black for alternator output, which is the main power source.
Accessory feed wires were also consistantly black.
I jumped on Rob's statement because there's been a few guys recently who have thought the black wire on the ammeter or ignition switch is a negative (ground). Not only are they not a ground - they are ALWAYS HOT. If they ground those wires, they will melt the fusible link. And that will be a best case scenario.
I suggested the residential wiring as away to remember that Chrysler used black as well as red (and many other colors) on the positive side.