G`day macca.
I`m Not sure if the brakes can be adjusted with the drum on as it`s a long time since I`ve done a drum brake Patrol.
If not then you have to make sure that there is not a lip on the drum as this will cause all sorts of grief.
What I would do is drill a hole through the drum or the back plate to line up with the adjuster and put a rubber plug in it after the job is done.
Going by what you have said the adjustment would seem to be your problem.
To adjust it you should adjust the brakes up until they are looked solid then back them off until the wheel turns freely, but as said the LSD will give you some grief
To turn the drum use a long bar across the wheel studs and also you can do one with the opposite drum off the car, this will at least make one side easier.
Pity I`m in SA otherwise I`d help you out.
best of luck mate