The WJ GC CRD is a great truck and I really do enjoy driving mine.
I'm really happy with the way mine drives but I've replaced all of the suspension components so it does. I think a lot of the wobbliness comes from old and worn rear lower control link bushes. They let the axle float around heaps when under load.
it is a little "pitchy" in comparison to other 4wds which is probably the OME dampers more than anything, overall it works well for me.
It is surprisingly comfortable offroad and on corrugations.
My standard disclaimer on an older CRD diesel is don't buy it because it will save you money on fuel. That theory can go out the window very quickly if you need to repair something as parts and labour aren't cheap.
Often you are better off buying a V8, a little more fuel is used but a lot cheaper to fix.
Drover may still have a good GC he could sell you
Jason