You cannot just slap the mono file in place. #1. the PCM from the laserdisc is not at an approved Blu-Ray Hz level. it'll clip, drop out, have distortion. You need to properly convert it.
#2, the reel changes on the DVD are not the same as the BD. It is simply impossible to line this up at frame 1 and then just let it go. it will go in and out of sync throughout. My partner on this one is in the middle of it now and is making adjustments non-stop. We will likely end up making over twohundred adjustments.