*****TWIN BARREL-CARB SPOILERS!***** After the arguably unjust box office failure of his arthouse-dystopian sci-fi film “THX-1138” (1971), George Lucas was challenged by his mentor and American Zoetrope producing partner Francis Ford Coppola (“The Godfather” trilogy, “Apocalypse Now”) to do something challenging to his own avant-garde sensibilities, which, for young George Lucas, meant creating a warm,…