G'day,
QF64 JNB-SYD
30/6 Y 12 seats
(similar numbers in W & J)
01/7 Y 42 seats
(Another 40 odd combined in J & W)
Loads are notoriously inaccurate on that sector due to the South African Airways code share. Have heard that seats may be blocked out by SAA and not available to staff.
Good luck!