Not sure off the top of my head, but looking at pictures its looks pretty closer to the outer bracket used on 67/68 Z/28's with their double upper bracket. Not sure if the bends would match up when flipping sides of the motor, but they mount in the same locations on the upper water pump bolt, but the 67/68 used a short pump where the 69 had the long and I cant recall if the boss is longer or farther out to make the bracket special.
