Hi Adrian,
There is a good DMR plan on Ozroads showing the planned alignment:
From what I understand, the current route with the very steep approaches to Mooney Mooney Creek was definitely a worse outcome for the road design, but no doubt a better environmental
outcome.
I have to say that availability of so much historical material online these days, including things like the aerial photography posted below, is just mind-blowing. Research has come a very long way from sitting in the RTA Library making hand-written notes
and the odd scan, while trying to cross-reference with printed topographic maps.