JSC is missing some frames, so its running time is shorter than GOUT.
For example, in the final Tantive IV scene when Vader says "There'll be no one to stop us this time" there's a few frames missing from the end of that shot and a few missing from the subsequent shot of the star destroyer leaving Tatooine's orbit.
That interlaced frame shown in dark_jedi's thread is another example from the beginning of the "Going somewhere Solo?" shot.
So unfortunately, Belbucus' GOUT audio won't sync without some editing....