The Thorn EMI tape has what has been called the Fake ‘Chace’ mix. This was apparently an early attempt to mix the film in stereo using the original mono elements. Some of the differences show such as the dialogue in the Police Station shootout being noticeably more louder and clearer. However the biggest letdown of the mix is the audio is the wrong pitch. By the early ‘90s this mix was dropped and they reverted back to the original mono until the surround mix was made for the Special Edition DVD. I know someone on FanRes had taken the Fake ‘Chace’ mix and synced it to the BD and had also pitched correct it. I don’t have the track myself but here’s a link to the thread.
https://forum.fanres.com/thread-589.html?highlight=Terminator+fake+Chace