There are exactly the same connections at Stockinbingal as there are now.
Westbound trains can turn north at Stockinbingal and southbound trains can turn east.
Southbound trains going west and eastbound trains turning north have to reverse in Stockinbingal yard.
Eastbound trains may turn south at Stockinbingal. Westbound trains can only turn south by running around at Stockinbingal and backing out onto either the lines north or west.
The only flyover at Stockingbingal is that for Burley Griffin Way.
SSR have run trains to Newcastle via Gulgong reversing at Stockinbingal but clearly don't do it often enough to justify a direct connection.