Albert,
It was a long time ago.I do have some old timetables but you cannot rely on them to be completely accurate.
A Varig winter 79 timetable shows DC-10 on Wed and Fri,707 on Sun and 707 freighter on Sat.
I think there were 2 ANZ DC-10s at one point,for example a 1978 timetable has it operating to LAX/MIA/YUL on various days but I cannot see 2 on a Sun.
Ken.