alexp120 said:
If it were me, I would go with the easiest and match the duration of the DTS audio files to 23.976fps. I would use the audio from the 2011 Blu Ray cut as a guide to sync up the speed of the DTS audio, because

With AudaCity i can only adjust in 0,001% steps and this is not accurate enough.

alexp120 said:
Then, check the frame rate of the Gkar version—you can use the free app, MediaInfo. If it is at 23.976fps, then all you have to do is mux the audio and video together and you should be good–again, presuming that the Gkar version is 1997 frame-complete.

Gkar is PAL, so it’s 25,000 fps.
But i can simply slowing it down to any framerate without re-encoding by multiplexing it to a MKV container.