Likely odd/silly question :

1. Is there any decent chance of a successful turnaround time of 60-80 min at SYD ?

While ago , I was able to grab QF F ( one of the F experiences I am missing ) arriving from LAX 7:30am ( if departs on time , arrives 30-45min early ) and have been looking for immediate decent return to US East Coast . I haven’t yet found other option than AA F SYD -LAX - wide body to East Coast . The flight leaves at 9:10am though (fully cancellable ticket ) , I have been to SYD before (5 full days ) and not looking to spend an extra day . No luggage , of course .