regular vs roadshow versions on DVD

I just purchased the Region 4 DVD release of this film in Australia on the local MRA label,indicated as being sourced from abc pictures in the US.
Despite the running time of 154 minutes on the CD case, the film itself only ran 124 minutes, which equals about 129 minutes runtime once the Pal speed-up is taken into account. So I can only assume that this was the TV version as indicated here on IMDB. The extras however included the music for the prelude, the overture and the exit music, which brings the running time, if you include all the music, to roughly 144 minutes - which is the running time given by imdb for the roadshow version. So maybe it was the roadshow version, except Amazon describe the roadshow version as running only 130 minutes. But maybe they mean the film content only. Confused? I know I am. What then, is the 138 min version advertised on Amazon? Is this all picture or does it include music as well? Given that imdb gives the original theatrical running time for Duel in the Sun as 138 minutes I suspect that this must be it, as long as this running time does not include any musical extras and is for picture content only. In which case there is 8 minutes of picture missing from the roadshow version which is going to bug me a real lot now that I have bought it(or what I think is it anyway). Can anyone out there give a specific answer on this? Are both versions complete, or have there been cuts made to the film in one. If I were you and the film content was identical in both versions, I certainly wouldn't pay $30 extra for fourteen odd minutes of music. I hope this helps, but I suspect that even after buying my DVD and watching it I am still almost as in the dark as you until someone proffers further information.