When using 744 on true domestic flights (ie QF400 and above), they are sold as two-class, with P and upper deck cabins as J, and the lower desk J sold as Y.
So if booked in Y, as for a seat in rows 23 to 27 and you will enjoy the flight more!
Unfortunately I got a 74L (747-SP) MEL-PER, so had to stick with a Y seat. But I did get to say a last farewell to VH-EAA before it is scheduled to leave service next month (wonder if QF will hang onto them for a bit longer now?).

Cheers,
NM