Much appreciatedPotential for two different horns, at least in 1970, Prestolite (bracket is removable) or Sparton. Pictures below are of the Prestolite on the left, Sparton on the right. My Hamtramck fish, 11/69 build had the Prestolite. My 1970 LA build Challenger had the Spartons. Parts book seems to just have a single PN though.