The difference is not in the looks of the cluster, it's the way everything is wired in that car..and the burned up electrical parts are also a victim of that. In 76 they revised the wiring so that the Alt. gauge is no longer a direct part of the charging system circuit, so in essence they reinvented the Mopar electrical wheel. It's been my experience in working around these cars for 37 years, that 76 A Bodies are always prone to goofy electrical issues. Yours seems to be about what I would expect.