I used a 78 amp reman unit from an '87 Diplomat from Autozone for warranty and ease of exchange if there is a problem.No issues as yet on my '66 Chrysler after some wiring upgrades and amp gauge bypass.I'm not really familiar with the aftermarket alts.

1978 Round Up-1977 Warlock-1977 Powerwagon Adven.- 1976 Blue "Macho"-1974 Charger-1968 Fury III -1966 Newport *