Hi jerryshadoe!
First I'd like to congratulate you on this awesome project.
As it has been discussed ad nauseam on blu-ray.com and avsforum, LOTM BD is one of worst offenders in the revisionim department (edit, video, audio) and as a fan, it would be fantastic to have a reconstrucion of the Theatrical Cut with the best elements available.
Since you asked on the first post, I believe the best source for audio is the 1993 LD (http://www.lddb.com/laserdisc/04661/1986-85/Last-of-the-Mohicans-The-(1992)) as it features the best version of the original mix and overall a much better fidelity than the Brazilian TC DVD 5.1 remix (I'm from Brazil and I have this DVD).
LDs are unbeatable for audio on catalog titles