It was the first film in 70mm Dolby Split Surround. It played In 15 theaters in that format. I also saw it at the Ziegfeld. But there were not stereo surround speakers "on both ends of the screen". The surrounds were in their normal positions on the walls of the theater and in those days...
I also saw this at the Ziegfeld and yes, it was in 70mm Dolby split-surround, the first film (aside from one reel of one print of Superman, experimentally) to be so. However, there were NOT surround speakers on both ends of the screen. On both ends of the screen were left and right channels...